Shunsuke Kawamura is No.1 in sales performance at the real estate company where he works. He is trusted by his superiors and colleagues and even decided to marry the president's daughter. After the surprise party on the eve of the wedding, he accidentally fell into a manhole on his way home drunk, with only his cell phone at hand. But GPS can be wrong, and acquaintances and the police are unreliable. As the deadline approaches, he calls on his ex-girlfriend, the only person he can talk to, and the fans who have created accounts on SNS for help, but the situation develops in an unexpected direction.