When the Johnsons' Christmas present for Grover is stolen, Calvin and Dave team up to recover the gift in time for the holiday. Also, a nostalgic Tina tries to get into the Christmas spirit by reviving traditions from when Malcolm and Marty were kids.

As Tina spends considerable time with the charming new minister she helped select for her church, Pastor Don, Calvin begins to suspect the man may be coveting more than just job security. Also, Marty gets a surprise when he finally meets his disruptive new upstairs neighbor,.