Six months out of prison, and Bae Eun-gyeol has found himself fired from no less than 24 jobs. Determined to make a living somehow, he resorts to hitman work, only to wake up after a mission gone wrong at the mercy of a mysterious beast. Yet, in an unexpected turn of events, this wolf-like man offers Eun-gyeol an unbelievable amount of money to change the target of his hit…to none other than the man’s own father. Armed with nothing but tenacity, Eun-gyeol sets out on a tumultuous journey with a lone wolf by his side.