Anna (Karena Lam) seems to have a great life for both love and career in Singapore. Until she has to move to Shanghai. There she meets her ex-boyfriend. Ouyang (Lu Yi) and his wife. Si Yu (Karena Lam) who looks exactly like her. Love for her ex-beau rekindles and she decides to switch identities with her doppelganger for a week.
Si Yu then flies to Singapore where she lives with Billy (Tender Huang). Anna's current boyfriend. Anna gradually realizes that Ouyang is no longer the man she used to love and desperately wants her old life in Singapore back, but her alternate self has plans of her own too....