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● Movie Guide · Last updated May 13, 2026

Mr. Plankton: Plot, Cast, Ending & Where to Watch

2024 · South Korea · Comedy, Drama · — · Korean

Mr. Plankton is a 2024 South Korea comedy film directed by Hong Jong-chan. This guide covers the plot, full cast, an overview of the ending, where to watch, and similar films you might want next.

Read Ending Explained → Movies Like Mr. Plankton Where to Watch
ComedyDramaNotable
Original Title
Mr. Plankton
Director
Hong Jong-chan
Writers
Country
South Korea
Runtime
—
Release
Nov 8, 2024
§ 01 Plot · 6 min read

Mr. Plankton Plot Summary

Mr. Plankton is a 2024 South Korean romantic comedy television series written by Jo Yong, directed by Hong Jong-chan, and starring Woo Do-hwan, Lee Yoo-mi, Oh Jung-se, and Kim Hae-sook. The series tells the story of Hae-jo, a man who was the result of an error in artificial insemination, as he forces Jae-mi to accompany him on his last journey after learning he is terminally ill. It was released on Netflix on November 8, 2024.

● Quick takeaway

A man plagued by misfortune and his ex, the unluckiest bride-to-be, are forced to accompany one another on the final journey of his life.

§ 02 Cast · 4 roles

Cast and Characters

Woo Do-hwan headshot
Woo Do-hwan
as Hae Jo
Plays Hae Jo.
Lee You-mi headshot
Lee You-mi
as Jo Jae-mi
Plays Jo Jae-mi.
Oh Jung-se headshot
Oh Jung-se
as Eo Heung
Plays Eo Heung.
Kim Hae-sook headshot
Kim Hae-sook
as Beom Ho-ja
Plays Beom Ho-ja.
§ 03 · Spoiler Zone · Read with care

Ending Overview

How does Mr. Plankton end? Our spoiler-aware breakdown walks through the final act beat by beat — including the choices, motivations, and ambiguous final shot that viewers most often debate.

Read full Ending Explained →
§ 04 Watch · Updated May 13

Where to Watch Mr. Plankton

Availability may vary by region and change over time.

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Netflix
Streaming · Subscription
● Available
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Netflix Standard with Ads
Streaming · Subscription
● Available
View all regions & options →
§ 06

Frequently Asked

What is Mr. Plankton about?

A man plagued by misfortune and his ex, the unluckiest bride-to-be, are forced to accompany one another on the final journey of his life.

Where can I watch Mr. Plankton?

See the Where to Watch section below for the current streaming, rental, and purchase options in your region.