Be Happy

Zhang Weijian works in an advertising agency and is often bullied. However, he bears with it, with the aim to retire at 55 years. He gets to know Xiao Kaixin (a.k.a. Big S), an optimistic woman who aims to help as many people as she can. Weijian thinks she is a volunteer worker, but Big S is actually a radio presenter.

Weijian finds out that he has cancer and is torn as to whether he should go for treatment, as the doctor is unable to guarantee his recovery. His friend Dr Cheng Fang encourages him and tells him to discuss his situation with his wife Xiuming.

Weijian contemplates quitting his job and living with more dignity. He decides to apply for several credit cards, and even decided to bring Xiuming on a holiday. Xiuming is shocked at his change.

Weijian celebrates Cheng Fang's birthday and Xiuming mistakes both men having an affair. Weijian asks Cheng Fang to help explain to Xiuming and Cheng Fang brings Big S along. Instead of helping, Big S makes a mess of the situation.

Granny Chen wants to go overseas with her son Deguang but he claims it's inconvenient and doesn't want to bring her. Big S, Cheng Fang and Weijian come up with a plan to make Deguang realize the importance of his mother's love.

Mable tries to pair Big S with Cheng Fang, causing Big S to feel awkward. She shows Cheng Fang her messy room to let him know how incompatible they are. Cheng Fang is scared of dogs and when he sees one, Big S protects him. He falls in love with her as a result but is unable to express his feelings.