It's Christmas in Hawaii and Five-0 travels to the Big Island,where Max is forced to work with a rival medical examiner aftera cowboy is poisoned. Meanwhile, McGarrett pressures Dannyinto stealing a Christmas tree.
Brody wants to work his way back up to the top, in an effortto get noticed by Mansfield. But the only people who seem tonotice the extra effort he's putting in are Derrick and Harvardwho are worried that they may be put out of a job by him. Jennyis thrilled when she finds out that she and Lindsay went tohigh school together. But Lindsay shares her high schoolmemories of Jenny and it casts her in a whole new light.
Upon returning from Paris, Brody has to face up to Mansfield.Whilst Jenny has to deal with a spurned Harvard fan who hasfired nearly everyone on the ground floor. Brody finds itdifficult to get back into Mansfield's good books, as Lindsayhas already taken his place.
An unsuspecting traveler brings a blood-sucking legend with himto Portland, and Nick and Hank find themselves investigatingthe gruesome trail of "El Chupacabra." Meanwhile, Monroe andRosalee prepare to leave for their long-overdue honeymoon asthey are met with more threats regarding their marriage.Elsewhere, Viktor and Adalind decide to take a trip of theirown, while Wu decides to confront Nick about what he has beenseeing.
Nick and Hank are called to investigate a bizarre string ofhome invasions that lead to an even stranger Wesen phenomena.Monroe has a very special Christmas surprise in store forRosalee. Meanwhile, Trubel comes to a life changingrealization that will affect everyone.
The ghouls begin the restoration of the Top Banana 1972 DodgeCharger Rallye. Daren gets suspicious of the monthly budget andMark finds an all original, numbers matching, Hemi DodgeChallenger.
Parker goes for his best clean up so far this season, Tonyattempts to rip the trommel out of his 75-year-old golddredge, and the Hoffman crew is stunned by the death of an oldcrew member.