Eddie and his friends have finally had enough of Courtney. She is always bragging about how incredibly brave she is and acting like nothing in the world can frighten her. Eddie decides it is time to put her courage to the ultimate test. He cooks up a brilliant plan to lure her out to Muddy Creek, a spooky spot where everyone whispers about slimy, terrifying Mud Monsters lurking in the deep. Eddie knows Courtney secretly believes the creepy rumors, even though he thinks they are just silly stories. He figures it will be a simple prank to finally give her a good scare and knock her down a peg. But when they actually get down to the dark, squishy banks of the creek, things do not go exactly as Eddie planned. What if the local legends about the Mud Monsters are actually true? You are in for a fright as a simple practical joke takes a very real, super-scary turn.