An underground fighting circuit run by an international crime syndicate invades a retired MMA champion’s small, idyllic island hometown. Syndicate thugs brutally assault his wife and kill his best friend, leaving him with no other choice but to fight for justice.

An intellectual crime investigation team goes after company Won Network. The company is involved in a massive fraud case. Kim Jae-Myung is the leader of intellectual crime investigation team. He is smart, charismatic, aggressive and bold to lead the intellectual crime investigation team. President Jin is the president of Won Network. Park Jang-Goon is the Section Chief of Won Network. He is the brains behind Won Network.