A brand new museum has opened on Sesame Street, the Museum of Modern Cookie! Cookie Monster, Elmo, and Chris are very excited to check it out. However, when they step inside, all of the cookie art starts to make Cookie Monster hungry for cookies. Chris explains that he needs to control himself and use only his eyes to look at the paintings. Prairie Dawn welcomes them to the museum and gives them a tour. As they walk through the museum, Cookie Monster stops and sees the famous Muncha Lisa by Leonardo da Crunchy and learns how it was created. They also learn about The Cookie Eaters by Vincent Van Dough and The Cream by Edvard Munch. Suddenly, the paintings begin to disappear, and the museum guards think Cookie Monster has stolen them. Elmo knows Cookie Monster didn't steal the paintings so he becomes a detective and looks for clues to find out who really took the art. He finds crumbs, butter, and chocolate chips, and they realize that the thief must be a cookie. But the guards do not bel