Kairos

October 26, 2020

Corporate executive Kim Seo-jin (Shin Sung-rok) and young woman Han Ae-ri (Lee Se-young) discover they can communicate across a one-month time gap — she is one month in the past, he one month ahead. His daughter has been kidnapped; her mother has disappeared. They realise their cases are connected.

November 2, 2020

Ae-ri's world in Seongbuk-gu established — the older residential streets, the ordinary life one month behind Seo-jin's corporate present.

November 2, 2020

The Gangnam corporate world one month ahead — Seo-jin navigating a crisis that Ae-ri can still prevent if they communicate accurately.

November 9, 2020

The full connection between their two cases — how the kidnapping and the disappearance are linked — begins to emerge.

November 9, 2020

Ae-ri uses information from Seo-jin to alter events in her timeline. The consequences — intended and unintended — are carefully tracked.

November 16, 2020

The criminal conspiracy connecting both cases has deeper roots than either suspected.

November 16, 2020

The time gap at its most productively used — both characters exchanging information with maximum efficiency across the month that separates them.

November 23, 2020

Events in Ae-ri's past timeline become dangerous. Seo-jin can warn her but not protect her.

November 23, 2020

A loss in Seo-jin's future timeline that changes what he is trying to save.

November 30, 2020

The conspiracy's leadership and its motives are revealed.

November 30, 2020

The one-month gap narrows. Seo-jin and Ae-ri's timelines are converging.

December 7, 2020

Both characters acting simultaneously in their respective timelines against the same conspiracy.

December 7, 2020

The first episode where both characters experience the same calendar moment simultaneously.

December 14, 2020

Both timelines converging on the same resolution.

December 14, 2020

The finale. A clever, tightly plotted sci-fi thriller that used its time-gap premise with unusual rigour — every action and consequence tracked across both timelines.