Chesterfield lost their League Two table-topping status tonight at the hands of old boss John Sheridan.
Despite a see-saw game, they couldn’t find a second equaliser at Plymouth Argyle.
The loss saw rivals Rochdale go top after they had won at Northampton.
Plymouth started the evening two places outside the Play Off zone.
Paul Cook’s team had only won two of their last six league outings, so a win at Home Park would have been a perfect compliment to last Saturday’s 3-0 win over Oxford United.
Tonight they were unchanged. Durrell Berry and Dominic Blizzard were out for Plymouth.
Swiss midfielder Andres Gurrieri sent a first minute chance over the crossbar for the home side.
But Plymouth were held at bay as they attempted to seek an early advantage, their striker Reuben Reid testing Lee at one point.
Reid eventually made his mark though, a right-footed shot from the side of the box flashing past Tommy Lee on 27 minutes.
The former Rotherham United man had another great chance, but fluffed his lines, before the half time whistle went.
Chesterfield came out with all guns blazing after the break.
On 56 minutes a corner was cleared but only to 36-year-old defender Ritchie Humphreys - and he fired first time for 1-1.
Yet two minutes later, 25-year-old Reid again found space and time to convert to put the visitors behind again.
Spireites knew they had to dig deep - but in pressing forward also risked conceding on the counter attack.
Marc Richards set up substitute Eoin Doyle but his effort was stopped by goalie Jack Cole with seven minutes left. Richards was then unlucky with an effort of his own.
At the other end, midfielder Conor Hourihane got through but Lee denied him.
Spireites (4-2-3-1): Lee; Darikwa, Evatt (c), Cooper, Humphreys; Morsy, Ryan; O’Shea, Banks, Roberts; Richards
Subs: Dunbavin, Smith, Hird, Bennett, Kearns, Gnanduillet, Doyle
Plymouth (3-5-2): Cole; Blanchard, Trotman, Nelson; Gurrieri, Young, Wotton, Hourihane, Parsons; Reid, Alessandra
Subs: Dawson; Morgan, Harvey, Thomas, Banton, Purrington, Obadeyi
Attendance: 6,012 (92 from Chesterfield.)