Dr. Panda becomes a mailman, but on his first day of work, he arrives late because his alarm is broken, resulting in a reprimand from Ritchie. As he is about to start working, the conveyor belt machine breaks down, causing packages to get stuck and some recipient address labels to be attached to a single package. Dr. Panda seeks ideas to ensure that the package is delivered to the correct address by visiting all the recipient addresses and asking which package each of them bought.