Stacey McGill is moving back to New York, and her friends must face the sadness of saying good-bye, hunt down the perfect farewell gift, and take on the difficult task of filling Stacey's place in the Baby-sitters Club.

James can't wait to spend the weekend at his grandmother's house with his sister, Ruthie. When they arrive, his grandma seems different. She's wearing a strange black dress and has boarded up her windows. James soon learns that she has been turned into a vampire by her creepy friend, Victor. James worries Victor wants to turn Ruthie into a vampire and must protect his sister until their mother can pick them up.

Marley is not given a choice when her newly separated parents decide she will spend the summer with her dad and make her take a job she did not ask for, but things start to look better for Marley after she meets a cute boy who loves dogs as much as she does.