The only goal of the game was scored by Emmanuel James from the penalty spot in the 62nd minute after Peter Eneji was fouled inside the box.
The win sees Plateau bounce back from their matchday-25 2-1 away defeat to Abia Warriors.
Plateau United now have 48 points, after 26 round of games played so far.
At the Agege Stadium, it was not the best of starts for former international Duke Udi as his team Sunshine Stars lost 2-1 to MFM FC in his first game in charge.
Tchato Giscard opened scoring for MFM in the 27th minute before NPFL top scorer Stephen Odey made it 2-0 with 79th minute penalty to take his goals for the season to 16.
In added time, Sunshine Stars reduced the deficit as Ajibola Otegbeye scored from the penalty spot but MFM held on for the win.
With the win, MFM go up to second position on 43 points, five adrift of leaders Plateau on the log.
At the UJ Esuene Stadium in Calabar, 10-man El Kanemi, suffered a setback in their quest to be crowned league champions as they were hammered 4-0 by Enyimba.
Bartholomew Ibenegbu gave Enyimba the lead from the penalty spot in two minutes of added time in the first half.
A brace from Chinonso Okonkwo (47th and 60th minutes) and a solitary goal from Stephen Chukwude on 87 minutes, secured the comfortable win for Enyimba.
El Kanemi's Efe Yarhere was sent off with 15 minutes remaining in the game.
With the massive win, Enyimba are now third on the log on 41 points with El Kanemi dropping from second to fifth on 40 points.
Champions, Rangers, edged FC IfeanyiUbah 1-0 in the Oriental derby inside the Nnamdi Azikiwe Stadium in Enugu.
The only goal of the game was scored in the 34th minute through Ifeanyi George.
Rangers move up two places from 14th to 12th on 35 points in the league table.
And in Ilorin, ABS had to rely on a late goal to deny Kano an away win as they had to settle for a 1-1 draw.
Rabiu Ali got on the score-sheet in the 54th minute but an 89th minute goal from Samuel Oyedeji made sure both teams shared the spoils.
In other matchday-26 games played at different venues, home team Katsina United pipped 10-man Niger Tornadoes 1-0, Gombe beat visiting Abia Warriors 2-1, Remo Stars were forced to a 2-2 draw at home by Akwa United while Wikki Tourist edged Lobi Stars 1-0.
NPFL matchday 26 Results
ABS 1 vs 1 Kano Pillars
Rangers 1 vs 0 IfeanyiUbah
Enyimba 4 vs 0 El Kanemi Warriors
Plateau United 1 vs 0 Nasarawa United
MFM 2 vs 1 Sunshine Stars
Katsina United 1 vs 0 Niger Tornadoes
Gombe United 2 vs 1 Abia Warriors
Remo Stars 2 vs 2 Akwa United
Wikki Tourist 1 vs 0 Lobi Stars