Green Mountain Travel Agency

Qingshan Travel Agency sits in the heart of the city.

Every day, a steady stream of people come here to sign up for trips.

You would think a travel agency doing such good business would have plenty of employees, but its owner is fretting because he cannot find anyone to hire.

And the reason he cannot find employees is not low wages, but something else he cannot reveal.

Wu Xu stumbles upon the agency by chance and, after working hard to prove himself, gets a chance to work there.

But he never expected this job to be the beginning of a nightmare. It comes crashing over him like a tidal wave, so terrifying that he can barely breathe.