They were family...once. An eon ago Kim Namjoo's freshly divorced mother married Kim Jongin's father in hopes of a better life. Unprecedented was a blossoming relationship between Namjoo and Jongin that causes his sister to become suspicious of them. Then marital problems start to create tension in the newly created family. A complexity of issues breaks them up, separating Namjoo and Jongin. Years later Jongin is back from studying abroad with a girlfriend in tow and Namjoo is getting engaged