Easton Mikus and Tyler Jordan scored two apiece and Ben Laurette made 37 saves for the shutout to lead the North Stars to a 2-0 best-of-seven series lead over Wisconsin.
Wisconsin rallied from three goals down to tie their playoff opener against Thunder Bay, but the North Stars scored twice in the third to put Game 1 away.
Forward Easton Mikus occupies a regular spot in the North Stars lineup while his older brother, defenceman Max Mikus, has made a pair of appearances this season.