Rebecca Ramirez's birthday is just two days away, and she's having a slumber party. She made the invitations herself, with rainbow ribbon hair clips and everything. But now the invitations are gone. Somebody took them. And the whole party is ruined. Or is it?
When one of Nancy's best friends, Bess, asked George to hold her locket while she jumped rope, George lost the locket. When Nancy went to investigate the missing locket, she found a clue - a peanut butter, mustard, ketchup and relish sandwich!