BOURNE – Bishop Stang was down to its final breath Saturday, but was able to pull through with a miraculous touch.

Freshman standout Avery Frias sniped the game-tying goal in the final minute of regulation before sophomore Madisyn Blanchard buried the game-ending tally in overtime as the 15th-ranked Spartans continued their Div. 1 girls hockey Cinderella run with an unforgettable 3-2 upset of No. 6 Methuen/Tewksbury.

“It’s surreal,” said Bishop Stang coach Bill Theodore. “These kids are just unbelievable. They never give up. They never give up. We’ve played so many one-goal games this year, I think it’s tempered us for them.”

For much of the playoffs, Bishop Stang (18-5-1) has been opportunistic with scoring chances, and the trend carried into Saturday. After seeing Methuen/Tewksbury control the tempo in the initial stages, Isa Rioux started a 2-on-1 break for the Spartans. The sophomore fed a cross-ice pass to an oncoming Kacey Curran, who fired a rocket into the twine to give Bishop Stang a 1-0 lead with 7:52 remaining in the opening period.

However, Methuen/Tewksbury (19-2-3) would respond in an unorthodox manner. After her team started a penalty kill, Ella Duffy blocked a one-timer, then took off herself on a breakaway with nothing but daylight in front of her. The senior forward deposited the puck in the net for a shorthanded tally, as the Red Rangers drew even at 1-all with 6:11 to play in the second.

As both schools looked for the potential clincher, senior MJ Petisce fired a prayer into traffic. The puck took an odd trajectory, like a knuckleball as it skipped off a pad before settling in the cage to give Methuen/Tewksbury a 2-1 edge with 11:44 remaining.

With the clock rapidly ticking on their season and their dreams, Frias skated up the wing, looking to make something happen. The freshman deked past the goalkeeper, and potted the equalizer with 26.3 seconds to play as Bishop Stang fans erupted in pandemonium.

“It feels amazing,” said Frias. “Even though I’m just a freshman, I was able to pull through, and help my team get to the Garden, which is where we really wanted to go.”

With 1:06 left in the extra session, Blanchard collected the puck and rolled around the Methen/Tewksbury net, searching for a shooting lane. When she released, the puck took a unique path to the net, sliding slowly through traffic uncontested. It struck the right post, slipping in as Bishop Stang punched its ticket to TD Garden – the first time it has done so in school history.

“This program has gone through so much,” said Blanchard. “We are making literal history. We didn’t make it past the first round the past few years that this program has been in Division 1. To make it this far with this team is just insane. To do it the way we just did? Unbelievable.”

Bishop Stang will look to complete its miraculous journey by capturing the state final when it faces off with top-ranked Hingham on Causeway Street.

“It’s kind of (a Cinderella run) of sorts,” chuckled Theordore. “It’s turned into a wagon.”