Twenty years ago, Cain, the old vampire king, was ambushed and fell into slumber. Waking two decades later, he abandoned his throne and fortune, returning to his wife Elena and daughter Leah as a security guard to make amends. Elena raised Leah running a fried‑chicken shop. When Leah was bullied at school, Cain saved her, exposing his identity. Enemies emerged and kidnapped his loved ones. He braved deadly traps and defeated powerful foes alongside his family. Rejecting the crown, he donated his wealth and held a simple wedding. The former blood king learns true strength lies not in conquest, but in guarding ordinary family life.