Trouble is brewing at Spellman's Magical Museum of the Circus when a group of people join hands and block the entrance the the museum... but they let Sarah Jane in, what is this mystery all about?

Luke is going for a sleepover at Clyde's house whilst Sarah Jane goes away for the weekend, during which Clyde's estranged father Paul turns up hoping to get to know his son. Meanwhile Rani discovers that one of her classmates is in possession of a strange locket, that can be used to control people.