Two strong and independent men, one an omega (Zhan), the other (Yibo), an alpha. Neither one believes in being fated because of their second gender. Both are independent, rich, and well established, but what happens when a drank Yibo wanders into the wrong room at the most inconvenient time? And neither one has a complete memory of that night?

Ten-year-old Yibo once saw a puppy enter a forest, following it under the full moon, they stopped amidst. The pup didn't notice his presence and transformed into a beautiful human kid. The next day, it happened again. It happened a couple of times until one day, he didn't show up. He waited until late, but there's no single presence. Upon arriving home, he found his father dead on the floor while his mother was wounded. It was then found out that wolves attacked them. He resented the wolves, but refuse to include the beautiful human kid as one of them. Twelve years passed while bringing his resentment to the wolves with him, he became the top assassin of the vampires, killing wolves but never been caught with human police nor wolves. But one day, he was appointed to kill a wolf, a top-class that killed many of them. Will he be able to succeed?