"It's raining, and Ben is stuck inside with nothing to do. Then he comes up with a wonderful idea: he is going to build a fort! 'But a monster might move in! say Mom and Dad. Ben decides to make his fort with comfy pillows and soft blankets - much too cozy for a monster! Afterplaying for a while, Ben wishes that a monster would move in after all. BIG MISTAKE!" - Dust jacket.