As Joe gets Nash's 'Cuda detailed secretly, as a Christmas present, it is stolen, much to his despair. Meanwhile, the rest of the SIU team are stuck at the precinct on Christmas eve until they wrap up a murder investigation.
A young Hispanic man plans to announce that he has converted to Atheism on Christmas much to the chagrin of his devot Catholic family, but his grandmother is determined to bring him back to God by then, or kill him trying.