Eunho, a motel clerk in a seedy part of town, has always been cynical about relationships, both familial and romantic. His daily exposure to infidelity and conflict has left him jaded and questioning the authenticity of love. However, his perspective shifts dramatically when he unexpectedly becomes the fifth member of a mysterious family. As he delves deeper into this enigmatic world, Eunho is confronted with questions about the true nature of this "Family" the identity of Chae Bonggu, and the secrets that bind them all together. The unfolding mystery draws Eunho into a web of intrigue and self-discovery that challenges everything he thought he knew about relationships and human connection.