Lucy is a widow and a police officer. One day, a young couple and their little daughter, Rose, move into the neighborhood where she lives, bringing a fresh spark to her monotonous life. However, she soon discovers that the father of the family, the artist Yan, is actually a man with a criminal record and an anti-police violence activist! Lucy, in order to maintain their friendship, hides her identity as a police officer from Yan’s family. At the same time, the police department orders her to go undercover and monitor Yan. The conflict between her professional ethics as a police officer and her desire to help this family creates a dilemma, and the tests that follow force her to make a difficult decision…