FACE YOUR FEARS! That's what the meditation app with the cheesy name De-stress-o-rama is telling Lena to do. She's one of seven always-worried middle schoolers trying out this new app to see if it can help students handle stress. But something is going wrong--very, very wrong.

The group's fears are becoming all too real, first lurking and dangling, then chasing them around and threatening to swallow them whole. From a stubborn inky blob that is fear of the dark, to the queasy giant in sweaty underpants that is fear of public speaking, monsters are invading Cranberry Bog Middle School! Can Lena's group of worriers figure out how to conquer their fears before the whole school is swarmed?