Barnsley secured their first Championship win in five matches against 10-man Plymouth.
Anderson De Silva made it 1-0 when he headed in Diego Leon's clipped free-kick for his first goal of the season.
Barnsley secured the victory in the last minute when Jamal Campbell-Ryce scored from the spot after David McNamee tripped Leon.
Plymouth went a man down early in the match when Simon Walton kicked out at De Silva in reaction to a challenge.
Barnsley boss Simon Davey:
"It was a hard-earned win and Plymouth made it hard for us although I thought we deserved it.
"I was disappointed in the first half, we did not pass the ball quickly enough.
"It has been a problem that we've not scored enough goals this season. We changed the system for this match and created a lot more. We scored two goals and could have had 22 - we have to learn to finish teams off."
Plymouth manager Paul Sturrock was furious with midfielder Simon Walton after he was sent off for violent conduct:
"You can train football teams, you can shape football teams, you can put them out and give them a gameplan.
"But when somebody does what he did in this game, all of a sudden the gameplan goes out the window.
"I'm proud of my players to be fair. In the second half we came out and gave it a go.
"It's hard enough winning football matches in this league with 11 men without having to play with 10 but to be fair they responded in the right way."
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Barnsley: Muller, Van Homoet, Moore, Foster, Kozluk, Campbell-Ryce (El Haimour 90), Hassell, De Silva, Leon, Macken (Odejayi 90), Cureton (Rigters 71).
Subs Not Used: Mostto, Coulson.
Booked: Foster, Van Homoet, Campbell-Ryce.
Goals: De Silva 37, Campbell-Ryce 90 pen.
Plymouth: Larrieu, Clark (Cathcart 46), Seip, Timar, Barker, Mackie (McNamee 32), Summerfield, Walton, Paterson (Noone 78), Gallagher, MacLean.
Subs Not Used: Marin, Folly.
Sent Off: Walton (28).
Booked: MacLean.
Att: 10,944
Ref: Dean Whitestone (Northamptonshire).
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