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Live-action · English original

Undertow

He cut open the hunting net on the sanctuary reef. She woke up with a knife at his throat — and said she knows where her mother is. The cave is collapsing and the trackers are still pinging.

55 episodes Live-Action Mermaid Romance Underwater Thriller Forced Partnership Marine Sanctuary Drama

The hunting net goes down on the sanctuary reef at night. Kira is inside it, the juveniles still below, and the pod's echo is gone. Then a diver cuts the net from the outside — Jordan, who pulled her life signal off the station boat on purpose. Kira wakes up with a knife at his throat. He does not beg: he admits he cut the net, says he did not have primary control, and tells her the one thing that stops her hand — he knows where her mother is caged. On the boat, Gray hands over the local copy of 17 seconds the server tried to delete. Then the cave starts to collapse behind them, and Kira says it out loud: her mother is alive, and they are extracting her voice tonight.

Undertow is available on YourChannel through its official player.

PlatformYourChannel
Episodes55
LanguageEnglish original
SubtitlesEnglish
PlaybackBrowser · official player
55 episodes · full series on the official player

About the show

Source: YourChannel official drama page & player — editorial coverage based on the opening arc; series details verified 27 Oct 2026.

The hunting net goes down on the sanctuary reef at night. Kira is inside it, the juveniles are still below, and the pod's echo is gone — she cannot hear the pod. Follow my tail light, stay together. The western fixture is still open. She holds the passage while the small ones go first. Then a diver cuts the net from the outside. He is not company. He is not on her side. He is Jordan, and he pulled her life signal off the station boat on purpose.

Kira wakes up with a knife at his throat: touch the wrong scale and I open you first, you decide. Jordan does not beg. He explains the net: I cut her net, the net didn't open, I didn't have primary control, kill me and you get half your revenge. Then he says the thing that stops her hand: he knows where her mother is. Keep me alive till tomorrow and I can get you to her cage. Gray, on the boat, sends the local copy of the 17 seconds the server tried to delete — the recording that proves the tracking net was activated on purpose.

The fragment is still buried under Kira's gill membrane, and that is how the company always finds her. Jordan asks permission to hold the outer scale: the scale only, not the gill slit, say stop and I stop. The cave starts to collapse behind them. Go under me, Jordan, fight down, don't fight the water, when I let go the cave closes, swim, take my hand. They make it out, the frequency is changing, and Kira says it out loud: she's alive right now, mother, they're extracting her voice tonight. The two people who started the night with a knife between them are now the only ones who can bring her mother back.

Meet the characters

Jordan — The diver who cut the wrong net
Jordan
The diver who cut the wrong net

Blond, bearded, wearing a dive jacket that still smells of the station, Jordan pulled a life signal off the boat and cut the net on his own. He is not company, not exactly on Kira's side either — he is the only living map to where her mother is caged. He reaches for her scale with a knife at his throat and asks permission first.

Kill me and you get half your revenge. Keep me alive till tomorrow and I can get you to her cage.

Kira — The mermaid who woke in the net
Kira
The mermaid who woke in the net

Silver-haired, scale-skinned, raised in the sanctuary pod, Kira is the pod's echoer. She protects the juveniles first, holds the passage, and gives the hunters the wrong target on purpose. She does not need Jordan to save her — she needs a map to her mother.

Gray — The recovery crew member on the boat
Gray
The recovery crew member on the boat

Short red hair, orange recovery vest, a job that was supposed to be pulling juveniles out of the net. Gray is the one who says the quiet part on deck: this was never a recovery, it was a hunt. She hands Jordan the local copy of the deleted 17 seconds.

Standout scenes

Editorial picks from the opening arc — the net on the sanctuary reef, the knife at the throat, the deleted 17 seconds, and the collapsing cave.

Episode 1

The net on the sanctuary reef

The hunting net goes down at night. Kira holds the passage open for the juveniles: follow my tail light, stay together. Then a diver cuts the net from the outside. The crew on deck says the line out loud: this was a live rescue, not a hunt.

Episode 2

The knife at the throat

Kira wakes up and pins Jordan underwater. He does not flinch: water is my air, I'm not restraining you, you're afraid. He admits he cut the net, says he did not have primary control, and tells her the one thing that stops the blade: he knows where her mother is caged.

Episode 3

The deleted 17 seconds

Gray hands over the local recording the server tried to erase: her gills are injured, the server copy deleted these 17 seconds, that's why I kept a local copy. It proves the tracking net was activated on purpose — and that the company is fishing for more than fish.

Episode 5

The collapsing cave

The cave starts to close behind them. Kira pushes Jordan through: go under me, fight down, don't fight the water, when I let go the cave closes, swim, take my hand. They make it out, and the frequency shifts — her mother is still alive, and the company is extracting her voice tonight.

Key moments

Frames from the opening arc — swipe to browse.

Undertow official poster
Official poster
The hunting net on the reef at night
Ep 1 · The net goes down
Kira holding the passage
Ep 1 · Follow my tail light
Kira with a knife at Jordan's throat
Ep 2 · Touch the wrong scale
Jordan pinned underwater
Ep 2 · Water is my air
Gray on the boat deck
Ep 3 · The recovery crew
The local recording
Ep 4 · The deleted 17 seconds
The gill membrane fragment
Ep 4 · The scale only
The collapsing cave
Ep 5 · Swim. Take my hand

Editor's take

Our editors' notes on the opening arc — personal picks, not audience feedback.

WebDramas editorial · on Kira

She wakes up in the net, puts a knife at the diver's throat, and makes him prove himself before she lets him breathe. She does not need Jordan to save her — she needs a map to her mother, and she will decide how he lives until she gets it.

WebDramas editorial · on Jordan

He cuts a net, owns it, and then reaches for the fragment in Kira's arm with a knife still at his throat — and asks may I? first. The slow melt from kill me and you get half your revenge to say stop and I stop is the whole arc.

WebDramas editorial · on the thriller

The fragment under the gill membrane, the deleted 17 seconds, the collapsing cave, the shifting frequency — the opening episodes plant one countdown after another. The company is extracting her mother's voice tonight.

WebDramas editorial · the bottom line

Best for viewers who like underwater mermaid thrillers with a forced partnership and a ticking-clock conspiracy; if you need a soft rescue romance, this one starts with a knife at the throat. Compared with most mermaid shorts, the lead holds the blade rather than being saved — that inverted power balance is both its strength and its limit.

Q&A

How many episodes does Undertow have?
The official player confirms 55 episodes in total.
Where can I watch Undertow?
The series plays on YourChannel through its official player; the Watch Now link on this page opens it directly in your browser.
Who is the mermaid in the silver hair?
Kira — the pod's echoer. She wakes up in a hunting net, puts a knife at the diver's throat, and decides to keep him alive until he leads her to her caged mother.
Who is Jordan?
The diver who cut open the hunting net on the sanctuary reef. He says he did not have primary control of the net, and he knows where Kira's mother is being held.
What are the deleted 17 seconds?
A recording on the boat server that was erased after the net went down. Gray keeps a local copy. It proves the tracking net was activated on purpose — and the company is hunting more than fish.
Who is Gray?
A recovery crew member on the boat who knows the job was never a rescue — it was a hunt. She tips Jordan off and hands over the local recording the server tried to delete.
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