9 minutes in and Dortmund were 2-0 up, 3-1 up on aggregate and the bookmakers were giving them odds of 50/1 on.
One problem. They forgot we are Liverpool.
It went all the way to the wire, the twists and the turns, but on another remarkable night - mere hours before the 27th anniversary of the Hillsborough disaster, Jurgen Klopp added his own legacy to Liverpool's remarkable European history. Alongside the Olympiacos, St Etienne's and Istanbul the reds now have Dortmund - and a small payback for the European Cup Winners Cup final defeat half a century ago.
Liverpool are now 3 games from what, mere months ago, looked an almost unbelievable aim of returning to the Champions League.
The reds looked lost even in the group stages when Klopp arrived to replace a struggling Brendan Rodgers.
The very fact that a resurgent Divock Origi, Mamadou Sakho and Dejan Lovren were amongst the goalscorers highlights how far some have grown under the new German manager.
Thomas Tuchel could only watch on as the early lead, thanks to one of European's most potent attacking strike forces, was eaten away by Liverpool - powered on by the vociferous support of the Anfield crowd.
The reds can go into the semi final draw tomorrow, no longer as outsiders for this tournament but most likely as favourites.
And after the two games against Dortmund - who could back against them?
Daniel Sturridge was again left on the bench - Divock Origi getting the nod after his impressive performances in recent weeks. With Jordan Henderson injured in the first leg, Roberto Firmino returned to the starting line up as Klopp picked a more attacking formation.
The build up to the game had been intense. Dortmund fans and Liverpool fans shared drinks and songs in Liverpool city centre. Liverpool's supporters welcomed the teams coach into the ground before the game - giving it a guard of honour - with flares and songs reminiscent of the 2013-14 season.
Before the game there was a powerful YNWA and then onto a minutes silence - a period of reflection for the 96 Liverpool fans who lost their lives after the Hillsborough disaster 27 years ago tomorrow.
Within 10 minutes Liverpool's away goal advantage was over. And possibly the tie.
Henrikh Mkhitaryan and Patrick Aubameyang had put Dortmund 2-0 up, 3-1 on aggregate. And for not the first time in the evening, Liverpool needed to score 3 goals against one of Europe's outstanding footballing sides.
But Origi was at the heart of everything good about Liverpool who improved in terms of play, but lacked the cutting edge of the Dortmund strikers.
Early in the second half Origi was on hand to give the reds hope - scoring early in the second half just as he did last weekend against Stoke. He ran to collect the ball from inside the Kop net. We had goals to score.
But shortly after Marco Reus made it 3-1 to Dortmund. Liverpool were now running out of second half minutes and needed 3 goals all over again.
Coutinho fired Liverpool's second. Sturridge and Allen were sent on for Lallana and Firmino.
Sturridge, Coutinho, Origi all on the field. Which one could help claw the next two goals back?
That's right. Mamadou Sakho.
With 13 minutes remaining the French international headed in from a cross to equalise. 4-4 on aggregate. But the minutes ticked by and Dortmund were going through on away goals.
The assistant held up the board. 4 additional minutes. The Kop sang You'll Never Walk Alone one more time.
And so in came James Milner's cross and in arrived Dejan Lovren - who headed the winner in stoppage time to send Anfield in to a frenzy.
The reds, undefeated in 12 European games this year, go into the draw for tomorrow's semi finals.