Penelope is a brave girl aged 11 who lives with Frances, her sick mother. To make some money, Penelope convinces local police officer, Cooper, to let his canine partner coop clean, Luey. Luey befriends Penelope quickly and even at night leads him to visit her mother who reach the hospital. Cooper, who became distrustful, Penelope discovers his secret. When Frances’s health worsens, Cooper must confront the reality of the situation Penelope. It needs hope, friendship and courage that these three friends to find happiness and to discover that are perfect for each other.