Post staff finds several mail boxes filled with goo - actually a chopped-up human corpse. Their address labels were deliberately messed up so as to strand them in a specialized post office, but a code traces them to a local Ship 'n' Print, where one employee is missing and proved to be the victim. Most of his colleagues resigned after jointly winning a fortune in the lottery. Sweets helps cut trough their endless lies. Booth gets a surprise visit from grandpa, on account of the death of Seeley's ever-absent father, which he's most unwilling to discuss. Bones leaves most of the field work to Booth's ambitious FBI cadet Genevieve Shaw, to accommodate her pregnancy, which renders Clark most uncomfortable.