"Slip" is the story of Sarah, a young woman who witnessed her mother's murder as a child. Now grown, Sarah is haunted by her mother's memory, her restless soul, opening a gateway for the spirits of the recently departed. Sarah is compelled to do their bidding so their souls may rest in peace. One of these souls leads her to Cal, a young car thief who is one car away from going legit. Unfortunately, Cal is wrongfully accused of stealing from his partners and now they want him dead.Sarah, drawn by the spirit of Cal's murdered nephew, becomes an avenging angel, awakening a dark spirit of her past while risking all to save a total stranger. Now in a race for their lives as well as their souls, Cal and Sarah soon discover that there are far more fearsome things than men with guns.

A group of young people leave Harlem for a bus trip down to Miami. The voyage starts off with problems, but it ends up becoming a learning experience, as they end up finding things out about each other they had not previously known.