Morecambe boss Jim Bentley was delighted to see his side pick up three points despite being nowhere near their best.
Padraig Amond's first goal for the Shrimps seven minutes from time earned Bentley's men their second successive home win and he praised his side's spirit.
Argyle took the lead through a Reuben Reid penalty but the home side equalised almost immediately through Kevin Ellison before Amond produced a superb finish to volley home the winner.
Bentley said: "It was a poor game and we were nowhere near our best but I have forgotten how many times I have come out after a match wondering how we have lost when we deserved something.
"It is all about the end result and I'm delighted that we got that because it showed that we can do the ugly things well when we have to.
"The lads showed great determination and stuck with it. We were a bit flat at first and we had to weather an early storm and gave away a sloppy penalty.
"After two defeats in our first three games two home wins in a row makes things look much better and it has definitely given us something to build on.''
Plymouth boss John Sheridan was raging after his side let the lead slip and was unhappy with the attitude of some of his players
He said: "I thought the game was there for the taking after Morecambe had a hard game in midweek.
"We took the lead and then gave it away about 10 seconds after and that was a massive disappointment."