The Inspectors are trailing a group of thieves stealing Christmas gifts from unsuspecting victims' front doorsteps. Bah humbug! Meanwhile, Preston, Noah and Veronica volunteer at the "Letters to Santa" program and find a mysterious letter from 1962. They vow to track down the sender and deliver a Christmas surprise.

Amanda and Georgia investigate a series of Post Office collection box break-ins with visiting Inspector Eric Lin. Meanwhile, Preston, Veronica, and Noah are on the hunt to find a band to play at the Henry Wainwright Foundation's inaugural event. But things don't go as planned, and they have to road-trip to find the band and talk face-to-face.