Everyone in Seoul fears Kang Minho.The youngest CEO of Kang Group. A ruthless billionaire. A man so cold that the media calls him The Devil of Seoul.But behind the power, wealth, and perfect image lies a secret no one knows.For two years, Kang Minho hasn't slept peacefully.Haunted by a tragic accident that destroyed his life, every night becomes a nightmare he cannot escape.Then he meets Han Areum—a struggling young woman drowning in debt and desperately trying to save her mother's life.When Minho offers her a one-year contract marriage, Areum accepts for one reason only: survival.It was supposed to be a business deal.No love.No feelings.No attachment.But everything changes when Areum becomes the only person capable of calming his nightmares... and the only person beside whom the devil can finally sleep.As dangerous secrets from the past resurface and a man presumed dead returns, their fake marriage becomes a battlefield of lies, betrayal, and forbidden feelings.Because sometimes, the most terrifying devils are the ones begging to be saved.And sometimes, love is the only thing stronger than fear