Once a promising athlete, Yoonbin is ready to give up everything after a series of injuries. At his lowest point, a mysterious man with a tiger tattoo gives him the strength to go on. Years later, when they meet again, Yoonbin learns his name—Kwon Young. Young is a man of the underworld, haunted by his past and ashamed of his choices. He pushes Yoonbin away, convinced nothing good can come from getting involved in his world. But Yoonbin isn't about to let go of the person who saved his life. After all, everyone deserves a light in their darkest moment.