The Case of the Polka Dot Umbrella (cap.4)

When the school staff room is broken into and Ms. Janis' earrings disappear, everyone is mystified. In addition, Handsome Harry declares to police that someone hacked his computer. Charly, who's fallen in love with his sister's friend Carol, thinks the thief is a boy with a polka-dot umbrella he saved from being injured in a car accident. But the gang discovers that the real culprits were Carol and Charley's love rival Tim, who were trying to cheat on some homework.