The McCallisters are going international but trouble has a way of checking in. Home Alone 4 The Alpine Protocol takes the chaos to new heights literally. Kevin McCallister Macaulay Culkin now a slightly paranoid father treats his family to a luxurious Christmas getaway at a high-tech ski resort in the Swiss Alps convinced that nothing can go wrong in a fortress of snow.
Twenty-five years after his original escapades Kevin believes he has conquered all his childhood fears only to develop a new one the fear of failure as a protector. The Alpine Protocol is his familys retreat a state of the art minimalist chalet designed to be impenetrable. Kevin meticulously checks every perimeter sensor and smart lock while his wife and twins try to enjoy the pristine snow.
The peace is shattered by a sophisticated European heist crew known only as The Edelweiss Gang. They target the resorts hidden vault during a massive whiteout blizzard a perfect storm that cuts off power communication and all routes of escape. Kevin gets separated from the group while attempting a last minute security check a familiar feeling of panic setting in as he is caught outside the resorts defenses.
Now it is up to his quick thinking twins to defend the massive high-tech chalet. Inheriting their fathers knack for improvised warfare and armed with his legendary Book of Traps the children turn the snowy landscape and the resorts luxury amenities into a nightmare for the intruders. Smart home systems high end kitchen equipment and the sheer altitude become weapons of slapstick destruction. Meanwhile Kevin must race against the elements and his own crippling anxiety to get back to his kids proving that the McCallister survival instinct runs deep in the family DNA and that some lessons in mischief are best learned at home. This Christmas the only thing colder than the Alps is the welcome the McCallister children give their unwanted guests.