Sisyphus

Aboard a falling plane as the clock ticks toward doom, Han Tae Sul puts his famous mind to work for a solution. Kang Seo Hae arrives in the year 2020.

The contents of a mysterious suitcase give Tae Sul more questions than answers. In exchange for lottery numbers, Sun agrees to help Seo Hae

Tae Sul's presentation at a conference gets a violent interruption. He and Seo Hae make a narrow escape, but more trouble soon follows.

On the run from the enforcement agency, Tae Sul and Seo Hae give in to the time traveler's request that they make a stop at his mother's house.

Caught by Kim Seo-jin trespassing in her clinic, Tae-sul tries to explain what's going on. Seo-hae reveals disturbing details about the future.

Seo-hae infiltrates Eddy Kim's party with a mission. After a series of distressing events, Tae-sul realizes he cannot trust everyone around him.

Seo Hae urges Sun to flee the country, and asks Mr. Park to do her a favor in exchange for an item he's eager to get his hands on.

Despite Seo Hae's insistence that he lie low, Tae Sul focuses on tracking down an enigmatic figure who seems to be tied to everything.

At the amusement park with Tae Sul for her birthday, Seo Hae encounters someone unexpected. A familiar threat strikes again.

Tae Sul enters enemy quarters to retrieve Seo-hae. Learning she's been put in a dire condition, he turns to a grudging Mr. Park for assistance

Tae Sul and Sigma come face-to-face. In order to rescue Seo Hae, Tae Sul must endure an emotional trip through his past.

When Seo-hae wakes up, a person she missed is waiting to meet her. A long-forgotten childhood memory returns to Tae-sul.

Tae-sul is reunited with a trusty friend, who comes to him with a warning. A suitcase containing disturbing contents arrives at Asia Mart.

With the war looming on the horizon, everyone must make their choices. When Seo-hae heads to the only place she knows, Tae-sul finds her.

As Tae-sul tries to locate him, Sigma reveals more details about himself. Sun frees Seo-hae from the bunker.

Tae-sul asks Seo-hae to trust him no matter what happens — and demonstrates that nothing is fixed when it comes to matters of the future.