With less than five minutes on the clock, Pompey were two goals down and heading for defeat at Fratton Park.
The hosts had dominated before the break, but a brace from League One’s leading marksman Luke Jephcott ensured Plymouth were on course to collect all three points.
However, goals from substitute Ronan Curtis and James Bolton in the space of a few seconds meant the spoils would be shared.
Kenny Jackett was pleased with the comeback and felt that his side certainly deserved something from the contest.
The Blues boss said: “I thought we played pretty well overall and just couldn’t find that final pass to get us a goal in the first half.
“We were on top for the majority of the game and had a lot of corners, but you do need to score when that’s the case.
"Credit to our players, who found a way to get back and it was a really spirited finish."
“Fair play to Plymouth, though, because they defended really well and made it hard for us all of the time.
“Jephcott’s the top scorer in the league and has got two more when they’ve really hurt us on the counter-attack.
“But credit to our players, who found a way to get back and it was a really spirited finish – we were unlucky not to have the ball fall for us in the box at the end.
“That fightback was led by Ronan and I’m really pleased, both for and with him. He gave us a real spark going up front.
“His finishing and physicality are big qualities. He went up alongside John Marquis and provided a threat.
“We want wins and that’s where the bar is already set, but we created a lot and there were some good individual performances.”