Luleå has linked a grip on the Swedish Championship gold with 2-0 in matches and can decide on home ice.
But against the knife to the throat, Brynäs has delivered.
Young talent Josefin Bouveng scored double goals in just a few minutes in the first period.
With his 2-0 goal halfway into the period, the 19-year-old scored his 13th goal in the playoffs.
Luleå's Noora Tulus got a reduction with just over a minute left of the second period and in the third period the equalizer also came to 2-2.
The match is in progress.