Ji Wooin is a clumsy but good-hearted police officer in the Community Safety Division. At 28, he's still single, still a virgin, and constantly pressured by his family to start dating. As the only son, he finally gives in and accepts a strange charm from his mother that's supposed to help him find love.

He doesn’t believe in things like that. It’s clearly a scam. Or so he thinks.

The next morning, he opens his closet and finds someone sleeping inside. A beautiful stranger, fast asleep as if he’s always belonged there.