HV71 had the knife to the throat when it was time for the third semifinal in the best of five against Brynäs.
The Gävle team had won the first two meetings and another victory would mean that Brynäs could advance to the Swedish Championship final.
After a goalless first period, Brynäs came out strong in the second and went up to an early 2-0 lead.
Lara Stalder scored her first goal in the playoffs before Josefin Bouveng filled in a couple of minutes later.
Two two-goal shooters
The same numbers would play out in the third period.
Bouveng became a two-goal scorer before Lara Stalder fixed the final score to 4-0 after HV71 took out the goalkeeper early and bet everything on one card.
The Jönköping team's season is thus over, while a Swedish Championship final series awaits Brynäs against either the big favorite Luleå or the challenger Djurgården.