Caillou is at day care, playing dinosaurs with his friends, when their caregiver tells them something very important: a new sickness is going around. Caillou learns that the best way to protect himself from the virus is to stay at home and wash his hands a lot. Adapting to a new daily routine can be challenging, but Caillou discovers that he can still have fun! With a little help from technology, he stays in touch with Grandma and his friends.