Beijing, the present day. Encounter. For three years, Gao Yuan (Zhang Wen), a 26-year-old low-level accountant in an oil company, has been catching the same flight every Tuesday to Yulin, central China, in connection with an important contract. On this Tuesday, going for an especially crucial meeting, he’s delayed during the security check by a diligent young officer, Shi Xiaolin (Baihe Bai), whose hand scanner wrongly keeps registering metal on him. Furious, Gao Yuan ends up missing his flight - the only one of the week - and berates Shi Xiaolin for ruining his career. She apologies and helps him get on a flight to Xi’an instead, from where he can catch a coach, but that flight is then delayed by bad weather. The two end up having lunch together, during which she suddenly reveals she knows an awful lot about him. Giving Birth. Mathematics professor Wang Yong (Tao Guo) and Xuelian (Jingchu Zhang) are a happily married couple in their 30s but childless. After her sister gives birth, Xuelian decides she and Wang Yong must approach their problem scientifically, by living for three months on super-healthy food and then timing intercourse to the exact moment when she’s ovulating. This doesn’t work out, and Wang Yong gets fed up having to perform on schedule. Instead, he develops a mathematical formula to solve their problem. Derailment. Married lovers Mei (Karen Mok) and Wang Yao - colleagues at work - are injured in a car accident one evening and Wang Yao is hospitalised in a critical condition. Mei’s husband Zhou Yunshan (Leon Dai), apparently unaware of her infidelity, is very understanding and Mei becomes more and more wracked by guilt as she realizes she betrayed his love. Rebirth. Young Jiaxin (Huan Huang) is released from a Police Drug Rehabilitation Centre and met outside by her boyfriend Song Haiqiao (Bowen Duan), with whom she stays when her father bawls her out. Both are members of a skydiving team but Jiaxin is about to be replaced due to her drug habit. Song Haiqiao tries to conquer her suicidal depression, and finally comes up with a unique solution.