Typical teenager Sam Collins and his friends secretly fight virus monsters by transporting themselves into the computer.

In this Christmas special, Malcolm and the evil Kilokahn have finally tracked down Servo. Kilokahn has ordered Malcolm to strand up Christmas lights to pin point him. When Kilokahn finds out that Sam Collins is Servo he tries to destroy him. Kilokahn turns on Malcolm and tries to destroy him as well. Now Sam and Malcolm have to work together after secretly being enemies all along. Servo now has to defeat Kilokahn in a finale battle.