When Chris Parker's (Elisabeth Shue) boyfriend (Bradley Whitford) cancels a date with her she decides that she is willing to babysit for the evening. As she is babysitting Sara (Maia Brewton) and Sara's older brother Brad (Keith Coogan), who has a crush on her, she gets a call from her friend Brenda (Penelope Ann Miller). She needs to go in to the city to pick her up and so she loads up Sara, Brad and Brad's friend Daryl (Anthony Rapp) and takes off. Before they get home from their adventure they must escape a car theft ring, sing the blues, and make it through a gang fight on a train. What an adventure!