Pearl is fluffing her pillows, when Deena bursts in with an idea to go scuba diving. Pearl doesn't want to do any outdoor activities today, but Deena states that it will be an imaginary swim. The two monsters picture their room is underwater and swim around. Pearl needs some cajoling to properly imagine the full underwater experience, as they pretend their beds are sea turtles (with coats), their bench is a shipwreck, and Deena's toy truck is a fish chasing Pearl. Eventually, they swim back to their room, though Pearl still has water on the brain as she briefly sees Deena's truck as a real fish.
