A skilled detective, Yeong-jun, goes to Busan to investigate a murder case. He needs to cooperate with his father, Min-ho, who is a veteran detective, but they have a bad relationship to fix.

Hyun-soo is a skillful individual stock investor, so-called ‘ant’. One day, he cashes in up seventy thousand dollars through stock trading and this jackpot gets him implicated in a $60 million stock manipulation by scam artists from various fields. With a huge pot of money before their eyes, the scam seems to be perfectly unfolding. But another scam is emerging underneath team as the scammers chase each other and are being chased at the end.