The Stray (2000)

Kate Grayson is a business woman living with her detective partner Ben. That is until Gil Draper, comes crashing literally (more or less) into their lives after bouncing off her car. Upon learning this seemingly homeless drifter has been on the streets for some considerable lengthy time. Kate despite her boyfriend's objections decides to let Gil recuperate in the garage of her guest cottage. However both her family and his share a connected history and beneath Gil's friendly peaceful exterior lies a concealed grudge, dormant until now.