This episode page has been compiled from the episode description at the NDR website.
Ella welcomes the viewer and says that she are expecting a visit from an old friend the master detective Nick Knitterton. She has backed him a cake and she just need to go and fetch some coffee and milk. While she are away Pferd comes by and sees the delicious cake, he is convinced that Ella made it to fill his empty stomach, so he eats it.
Ella returns and are shocked to see the cake are missing. Wolle comes by and Ella tells him about the missing cake and Wolle quickly declares it a case for detective Wolle. However he can't investigate the crime scene since he has forgotten his magnifying glass, he goes to fetch it.
While Wolle are away Nick Knitterton arrives, he instantly notice that something has happend and starts to investigate. Wolle bumps into Nick and they agree to investigate the case together. They start to sing a detective song, while investigating the scene. Nick locates a clue, black hairs, they conclude it must be from a black furred monster. They also discover a hoof print, and a napkin that have a teeth imprint.
Ella returns with a new cake, they tell her that they have solved the case of the missing cake, it was eaten by a hoofed black furry monster. Ella can't believe her own ears.
Pferd comes by and Wolle asks him if he has seen a blacked hoofed furry monster. Pferd says he have not seen such a monster, but he can see a delicious cake on the table and as he moved closer to the cake Ella and Nick jumps up from their seats and stops Pferd. Ella concludes that the blcked hoofed furry monster are in fact Pferd, Wolle and Nick agrees. Pferd admits that it was him that ate the cake.
Ernie eats one of the two pieces of chocolate cake that Bert was saving for their dessert. Bert sees Ernie holding a fork in one hand and a napkin with some chocolate on it in the other--and in front of him is a plate full of chocolate-cake crumbs. When Bert accuses Ernie of eating the cake, Ernie tells Bert that a monster came in, ate Bert's cake, and framed Ernie. Bert doesn't believe Ernie's lie. But when Bert leaves the room, Beautiful Day Monster comes in and does exactly what Ernie told Bert happened to the first piece. Ernie tries to explain, but Bert says, "I don't want to talk about it."
Forgetful Jones has forgotten his lunch again, can he save his friends from a herd of wild sheep.
Cookie Monster are the most unfortunate monsters in the world, even though he has selected the glass with the most marbles.