A cinematic special for the Infinite Challenge skit, Muhan Company.

Han Jung-woo, a pilot with top-class skills, is flying high and even appears on a famous TV show. But everything comes crashing down when a careless mistake causes him to lose everything, even his job. Blacklisted in the industry, no airline is willing to hire him. Desperate with no other choice, Han Jung-woo transforms completely into his younger sister's identity and succeeds in landing a job as a pilot.

The story of boys who are scattered in the past, present, and future to find the star of hope in order to save the Earth which is devastated by a virus spread by a group of evil.