Time is running out as Tae Myung Ha desperately tries to complete his mission against worsening odds.

Tae Myung Ha accepts Cha Yeo Woon's phone call, but the call makes him feel that something's off.

Tae Myung Ha sends Cha Yeo Woon a thoughtful gift, but Yeo Woon's reaction is not what he expected.

Cha Yeo Woon becomes more fond of Tae Myung Ha, and Yeo Woon proposes for the two of them to go on a date.

Tae Myung Ha accidentally enters Cha Yeo Woon's life, but he needs to keep his distance from him.

Tae Myung Ha is given a new mission and at the same time, he discovers that Cha Yeo Woon has been hiding something from him.

As Tae Myung Ha and Cha Yeo Woon get closer, more challenges come their way.

Cha Yeo Woon finds a pen on Tae Myung Ha's desk: what kind of ending will be written for the two of them?