Meera and Julian decide to set up a lost property office and find all sorts of 'lost property' outside people's houses. Pat delivers the post but important medicine for Amy's patients is lost when Jess and Bonnie play a chasing game in the back of the van. Pat attempts to retrace his steps to find the medicine and meets a number of irate villagers all of whom are reporting lost property to PC Selby. Pat realises what must have happened and leads them to the train station where Meera and Julian are presiding over their stall. They are downcast to discover that the property they'd taken wasn't really lost at all. Pat spots Amy's medicine on the table and congratulates the children for finding it. Amy rushes off with the medicine. The children apologise for their mistake. Pat tells them that a lost property office is a good idea, so long as the property really is lost!