were turned off during the break-in, leading him to believe that Mr. Prescott is in league with Marv and Vera. To cheer themselves up, Kevin, Peter, and Natalie decorate their Christmas tree, although it is later re-trimmed by professional decorators at Natalie's request. As the mansion is prepared for a party for the royal family's arrival, Peter and Natalie go to pick them up, while Kevin notices Marv and Vera disguised as caterers. He traps Mr. Prescott in the freezer, overhears Marv and Vera's plan to kidnap the prince for ransom, and forces them out of a window. The royal family is unable to attend the party because their flight was canceled, so Peter and Natalie decide to announce their engagement instead. Marv and Vera run back into the house and pursue Kevin, who accidentally ruins the party by running into the guests and knocking over an ice sculpture that turns out to be a frozen Mr. Prescott. Angered, Peter sends Kevin to his room, refusing to believe his story and accusing him of trying to sabotage his relationship with Natalie, who threatens to evict him if he misbehaves again. Taking matters into his own hands, Kevin sets up booby traps for Marv and Vera. The next morning, the duo head to the house after Peter and Natalie go to pick up the royals. Kevin tricks and locks Mr. Prescott in the basement, but eventually discovers Marv and Vera's real ally is Molly, who is also Marv's mother. Kevin gets locked in the basement with Mr. Prescott, who admits that he turned off the cameras during the initial break-in as he was taking an unscheduled break from his duties because he despises Natalie, let alone working for her; he and Kevin then apologize for misjudging each other. After several failed attempts to call Kate, Kevin escapes via the house's dumbwaiter and temporarily traps Marv underneath it. Marv and Vera pursue Kevin through the house, where they spring the traps and suffer various injuries, while Molly gets trapped in the house's elevator. At the airport, Peter suspects that something is wrong back at the house with Kevin and takes a cab back to Natalie's to check on him. Kate, Buzz, and Megan also drive to the mansion due to the suspicious nature of the calls received by Kevin himself and Molly. Kevin uses an altered recording of Marv's voice to provoke