When monsters invade Coal Hill, four students form an unlikely alliance to defeat them.

A dreadful new monster threatens the school, and the gang must unite to fight against it.

As April's connection to Corakinus strengthens, a sinister invasion begins.

April must confront Corakinus as the others try save the Earth from extinction.

Despite the rifts that have emerged since their time in detention, the friends must work together when their families are threatened by a foe they thought they had defeated.