In 2028, cartoonist Han Cho becomes obsessed with his neighbor, an assassin named Nana. He professes his love for her but she remains indifferent. By accident Han Cho finds an amnesia-inducing drug which he uses to spike Nana’s drink. With her memory blanked out, Nana is told that she is Han Cho’s girlfriend.

Jin-a, a young prostitute, moves into a seaside motel called the Birdcage Inn, run by a dysfunctional family. Struggling with her circumstances and the family's treatment, she forms an unlikely bond with the daughter, Hye-mi. As they navigate love, betrayal, and personal growth, their friendship ultimately leads to a deeper understanding and a chance for redemption.