Zou You, an "elder brother" who was adopted into a reorganized family and looks cold and good, has a beast called "the past" locked in his heart. He was once a lone wolf who traded his life for money in an underground boxing ring. Until that rainy night, a Band-Aid handed to him by his "sister" Zou Yu became the only light in his world. He restrained all his fangs, acted as the perfect brother, and buried his turbulent love and bloody past deep together. However, the peace was broken, and the former enemies were on the lookout, and the outstanding suitors surrounding "sister" Zou Yu were also eyeing her. When the gun is pointed at the person he is sworn to protect, the beast will eventually come out of the cage. He must make a choice between the examination of social ethics, the maintenance of family ties, and the torn love of his heart. Should he continue to wear the mask of "brother" and watch her go to others, or should he tear off the disguise and hold her in his arms even if he is burdened with infamy and is the enemy of the world? This is a war about taming and redemption. The opponent is the entire world, and the stakes are their lives.
