One day Lily told a lie. It wasn't a big lie. It didn't hurt anyone. She thought lies that didn't hurt anyone were okay, especially if the lies helped you a little. And they did help her...at first. The little lies turn into medium lies. Medium lies turn into big lies. Big lies turn into MONSTER lies. But Lily's lies turn into real monsters with buggy eyes and big slimy teeth. They appear everywhere and taunt her. Lily cannot escape until she discovers the one thing that can destroy a Lie Monster, especially an Eleventy-Headed one.