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In the six months after being released from prison, 24 part-time jobs were fired. Eun-kyul, who had done everything for money in terrible poverty, eventually joined the contract murder for the last bite, an d when he came to his senses, he was committing to an unknown beast. "Where did you crawl in from?" Eun-kyul, who has lived with the determination that "even if you go into a tiger cave, you live if you stay alert," has overcome the crisis, but whether you are a dog or a wolf, you will pay 10 billion won if you work for him, but the condition is to k ill his father and the chairman of the Myung-il group. "Whether you buy a house or a car, think about it as you want." The sweet and bitter companionship between a 23-year-old boy's head of household and a lone wolf begins.
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.