With four minutes left in extra time, the goal came that took Mullsjö to the semifinals.
Anton Hedin, on the left, received the ball undisturbed before he had time to load the shotgun.
The low shot was not particularly hard but well placed and looked in to the left of the goalkeeper.
The goal was Hedin's third in the playoffs and meant 8-7.
Mulljö had the lead with 4-2 but Dalen did not give up but both reduced and equalized in the second period.
When Dalen made it 7-6 with three minutes into the final period, the semifinals were close.
Christoffer Andersson became a two-goal shooter when he pulled in from a long distance and gave Dalen the lead.
But visiting Mullsjö came back.
With five minutes left, Jesper Sankell equalized.
The decision in extra time gave Mullsjö 4-2 in matches in the quarter-final series.
In the semifinals, Storvreta is now waiting.