After three years studying abroad, medical PhD Gu Jinyan is invited to work at the affiliated hospital of Yuncheng University. But when he returns to China, he discovers that the friend who was supposed to look after his house has rented it out for free to Lin Shu, his girlfriend's best friend, and even signed a lease with her. With no other choice, Gu Jinyan is forced to start living with Lin Shu. Since their schedules are completely out of sync, the two go a long time without ever seeing each other. Then, by chance, Lin Shu discovers that her roommate is actually her colleague, and what's more, her sworn rival, whom she can't stand…
