When a nasty bout of chicken pox comes to Greendale, Pat spends a busy day delivering calamine lotion to everyone who needs it. Pat's hard work and cheery advice helps them all to make a speedy recovery. By the time he has finished his rounds, Pat discovers that he's now the one covered in red itchy spots. When Julian tells his classmates the next day that his dad is poorly, the children of Greendale are ready to deliver a special get-well-soon message to their favourite postman.