The Benson boys return to Buckman for spring vacation and concoct a prank involving a non-existent ghost, continuing the practical joke war between the Hatford boys and the Malloy girls.

Something stinks! And it's coming from a science project in Ms. Gleason's classroom. Could someone have sabotaged the volcano? Looks like another mystery for the best detectives in the second grade!

A series of practical jokes at a restored nineteenth-century farmhouse makes the Aldens wonder if the ghost of its builder is at work.

Sophomore Frankie starts dating senior Matthew Livingston, but when he refuses to talk about the all-male secret society that he and his friends belong to, Frankie infiltrates the society in order to enliven their mediocre pranks.