David, whose friends call him Rocket is in the seventh grade at Grover Regional Middle and Elementary School. It is the last day of classes before April vacation and he and his best friend, a girl named James, are very excited.

Suddenly they find themselves Locked In! the school.

This novel for middle readers is told in alternating narrative by two seventh graders, Rocket and James. Join them for a whole week of adventures and their clumsy attempts to escape.