The team has another murder victim, the first victim's sister, which stretches the case through Christmas Day and raises more questions about the involvement of Armand and Joan Marku.
In the middle of the investigation, Brenda gets a panic phone call from her parents when their RV is robbed of all their Christmas gifts as well as its microwave.
Brenda, her the entire team and Captain Raydor's holiday plans change suddenly when a man is attacked by a knife-wielding assailant who is accidentally run over and killed by the police officer responding to 911 calls. The investigation takes a dramatic twist when it turns out the man's dead attacker is his estranged father.
Meanwhile, Brenda & Fritz receive a huge surprise for Christmas from Brenda's visiting parents.