Ren turns into a serial killer and Stimpy has to team up with SpongeBob and Squidward and the Rabbids to defeat him. Stimpy draws up weapons to fight Ren. Squidward gets an AK-47. SpongeBob gets a katana. The Rabbids get a four handle .50. Stimpy got put-to-sleep medicine. 17 minutes later they are at Ren's Cave. Ren shoots Squidward in the head. The Rabbids hit Ren in the torso. Stimpy put go-to-sleep medicine on SpongeBob's katana. SpongeBob actually stabbed Ren's brain, thus killing him. The team walks away as the episode ends.