Mr. Burns decides to hold a good old-fashioned fire drill in order to excite things up around the plant. Upon hearing the bells ring, the employees panic and fail to clear the plant within 15 minutes. Outraged, Burns declares that everyone will be subjected to a teamwork competition at Mt. Useful. Homer brings his family to the mountain, not realizing it was only for employees, so he leaves them in the visitor center. Homer ends up being partnered with Burns while Smithers has to journey on his own, fuming that he was not paired with his boss. The object of this competition is to reach a cabin at the top of the mountain; the last team to arrive will be fired.
Along the way, Burns talks Homer into cheating and they use a snowmobile (which Burns refers to as a "horseless sleigh") to reach the cabin. Arriving several hours early, they settle down in the comfortable surroundings. Burns and Homer quickly become friends. However, while clinking their champagne glasses, they inadvertently cause an avalanche that buries the entire cabin. Despite Burns's attempt to operate a telegraph machine or Homer's attempt to dig a tunnel through the snow, they remain trapped. The pair attempt further tunneling escapes, but each time they speak, they cause more avalanches that place even more snow between them and freedom. Meanwhile, Bart and Lisa meet Smithers and offer to help him proceed to the cabin, though they cause more stalling than helping.
Back in the cabin, Burns and Homer are beset by cabin fever. They build snowmen to pass the time (though Burns insists they build real men out of snow) and clothe them at the expense of their own warmth. The other employees reach what appears to be their destination; however, it is actually a ranger station and they begin to realize that something bad has happened to their colleagues. In the cabin, Homer and Burns stare at each other's eyes, filling their minds with paranoia. They are both driven mad and attempt to kill each other. After a vicious struggle, Burns ignites the cabin's propane tank, launching the building out of the snow and propelling it toward the horrified onlookers. Once it comes to a halt, Mr. Burns reminds everyone of the contest, and all the workers hurry inside.
Lenny is the last person in the cabin, and is told he is fired. Burns is informed the completion time of the competition has set a new record, and then decides that no one will be fired after all (although Lenny, who is outside and falls into a crevasse, does not know that). The episode ends with Mr. Burns and Homer alternately laughing and glaring at each other.