Sharon (Jennifer Lopez Jennifer Lopez) is a shrewd policewoman who is assigned to the south side of Chicago with the highest crime rate, where she exercises her responsibility and right to punish evil and promote justice. Although Sharon has done a great job in her career and is deeply trusted and appreciated by her boss and colleagues, the relationship between her and her family is very indifferent. To make matters worse, a painful memory has been hanging over Sharon, leaving her in despair from time to time. Cage (Jim Karwiese Jim Caviezel) is a frustrated man wandering the streets of the city. He takes care of strangers and neighbors and accidentally saves Sharon in a police and bandit chase. However, a disaster in the past made him lose his wife and daughter, as well as his memory, which made Cage very painful. With Sharon's help, Cage finally plucked up the courage and decided to find the truth of the tragedy. At the same time, Sharon's dark past gradually surfaced.