Caillou was excited for "Bring your toy to day care" day. He liked showing off his favorite things, Today he brought Gilbert which he shoved into a bag. Gilbert growled but was then exhausted from the warm bag. Gilbert passed out. "Good Kitty!" Caillou said as he filled the bag with cat food and milk. Caillou got into the car and rode in to Day care. Miss Martian was excited as the kids enjoyed Bring Your Toy Day! The kids sat around, Clementine showed everyone her new pogo stick! Leo showed his new tax calculator and nobody cared, Alan had a new therapy tool to help him communicate. But then it was break time! Caillou was excited to show Gilbert off, how was yowling in the bag Caillou shoved him into. Suddenly a kid screamed "OH NO!" It was Emma. Her insulin was missing and she was panicking. She needed help and Miss Martin had a spare bag for her. Emma was crying and Caillou was not going to take it.

Miss Martin walked out with Emma to the nurses office so she can get juice. The kids where alone, Caillou stood up. "THE COURT IS NOW IN SECTION!" He yelled, Leo tried to correct Caillou but Caillou slapped Leo and told him to sit down. "I know who did this..." Caillou said, he ran and flickered the lights. "It was... Xavier!" Caillou pointed in anger at Xavier "Por que me estas acusando racista!?" Xavier said. He was not pleased. "I dont know what you said..."BUT I SAW YOU GRAB EMMAS BAG!" Caillou shouted. "Eres Autista?" Xavier said. The rest of the kids where confused. "HE ADMITS IT!" Caillou said loudly. The kids glare at Xavier. Xavier waved his hands and shook his head no. "Se lo que eres ti, espacio mexicano...muerto a los dorechos." Caillou said. Xavier was hurt in confusion on both being accused as a "Space Mexican" and Caillou speaking Spanish. "He is lying...he is a liar." Xavier said trying to defend himself. But Cailou stood up. "For the theft of Emmas bag, I find you GUILTY!" Caillou grabbed his bag, opened the top and threw it hard at Xavier, Gilbert and soggy wet cat food exploded out of the bag, Gilbert shredded Xavier's face. Xavier thew the cat aside and cried in pain. Gilbert hissed and bared his claws and hid on a shelf. Xavier weeped and found the sink, he washed the blood off his face. It stung really bad. Caillou stood proud when Miss Martin walked in. "Whats going on!" she said loudly. Caillou walked up "I took care of the criminal Miss Martin! Emma is Safe!" Miss Martin saw the bag of wet cat food and Gilbert hissing at kids coming near him. Miss Martin spotted Emmas insulin bag which was next to Caillous desk. Miss Martian walked up and Caillou yelled "NOOOO!" as she saw it stuffed into Caillous desk. Caillou Stole the insulin! Caillou ran out the door "NOOOOOOO!" and ran down the hall. He shoved Alan over running by. Alan stood up and slowly walked back. Miss Martin was making calls to the police and Caillous Mommy. Alan sat down and chuckled, "mmmmission complete..." he said. Alan was the one who committed the crime. He stole the insulin bag from Emma bag and shoved it into Caillous desk. Emma played along with it too as they both hated Caillou. "Fffor you Tt-troubles." Alan handed Xavier a Candybar. "Nnow gg-go clean up." he said as he walked off.

That is how Caillou explored the field of being a detective.