A street gangster, who has suffered from a lot of neglect, and a transfer student, who has been ostracized, become each other's only friends in a series of accidents.

Buddies Meng Yun and Yu Fei break up with their girlfriends and indulge themselves in living the bachelor lifestyle again. However, as their ex-girlfriends reemerge in their lives, their “Single Plan” starts to unravel!