This is a story about a common man who has extraordinary events in his mundane life. The film depicts the protagonist's turns of events in three eras, three seasons, three nights, in the same city, as told with reverse chronology.

Introverted Weichung has been married to Feng for nine years. They have one son together, and Feng would like to have another child with him. One day Stephen, an old friend who now organises weddings, appears and encourages Weichung to return to the gay life he had previously. Anxious not to lose his wife, Weichung tentatively begins seeing a flight attendant behind Feng’s back.

On the same day, in the same accident, Wei loses his pregnant wife and Ming her fiancé. In Buddhism, one is given 100 days to mourn for the dead. Like two mice lost in a labyrinth, Wei runs around in circles while Ming calmly creeps down a determined path. But the pain and sorrow linger on. With the 100th day approaching, they wonder if they'll ever be able to say goodbye.