Isaac, Cameron, and Jackson end their holiday adventures with a time-traveling mystery set in the distant future. They've survived ghosts on Halloween, being trapped in a storm on Christmas, and villainous spies and a mad king on Valentine's Day. Cameron loves their trysts throughout time. Unfortunately, Isaac no longer loves these travels. Balancing a jealous villain and an honest conversation about settling down may be more than Isaac can handle. Can their relationship survive one more villain and a mundane future?