A rag-tag team of medalists turned police officers form a team to take down the forces behind a large crime group. Yun Dong-ju (Park Bo-gum), once a gold medalist in boxing, gets demoted after a scuffle with corrupt colleagues. While investigating a suspicious hit-and-run case that his friend becomes entangled in, he comes across officers Han-na (Kim So-hyun) and Jong-hyeon (Lee Sang-yi), who are investigating the same case. As a result, a special team consisting of 5 former athletes who are current police officers is formed with the addition of team leader Man-sik (Heo Sung-tae) and Jae-hong (Tae Won-seok). The team begin a challenging fight against dark forces in their city.