When the god of thunder's hammer goes missing, Magnus Chase and his friends are tasked with retrieving it before an onslaught of giants attacks the mortal world.

Someone at school keeps stealing the sandwiches from Marin's lunchbox, and he is determined to find the culprit.

Marty Frye, a seven-year-old who likes to read poetry and talk in rhymes, solves three separate mysteries for a classmate, a toy store owner, and his younger sister.