When Mr. Messy's favorite sock goes missing, he asks Dillydale's best detectives, Mr. Bump and Little Miss Sunshine to solve the mystery. First they try to follow the smell of the sock to find it. Then they look in some places where they think the sock might be: the local Laundromat and a sock puppet show. They even throw a sock hop dance party hoping that someone will show up with Mr. Messy's sock. Where could it be? Put on your detective cap to help solve the case.