An aggressive virus completely wipes out Gabriel's memory and he thinks Jin Cong is good. Much to his detriment, his misconception of Jin Cong forces him to help find a secret hidden document.
When a Marine Corps vet's SUV is stolen with her service dog inside, Magnum and Higgins must find the car, the dog, and the car thief who they believe may be an escaped kidnapping victim.
Mac and Jack's mini-vacation gets cut short when someone from their past abducts them and locks them in a concrete room; Matty tasks Riley, Bozer and Leanna with stealing a diamond encoded with terrorist intelligence from a princess in Milan.
When Carol's overbearing parents visit for the holidays, Carol tries to cover up failed relationships. Nate considers getting back together with Janice.
Andrea organises a fun play date for her daughter with a new girl but is horrified to discover that her daughter may be racist.
