Danville responded and pulled within one at 14-13 near the end of the first with two free throws from Hannah Newby.
The two teams opened up their offenses in the second quarter and Plainfield surged to a 28-20 lead with 3:25 left after a Maddie O’Day 3-pointer and bucket from Kayla Casteel.
Two baskets by Maleha Motter and a bucket and two free throws by Newby cut Plainfield’s lead to four at the half, 41-37.
Danville came out aggressively, feeding Motter in the post, where she tallied 10 of her game-high 24 points and built a 55-47 with 3:22 remaining in the quarter.
“I don’t know what it is,” May said. “We’ve consistently been a second half team and it’s a blessing and a curse at the same time.”
Down 57-53, back-to-back baskets from Blakeley Shurig and Kylie Dostin tied the game before two free throws from Danville’s Allie Lake put the Warriors up 59-57 heading into the fourth.
Knotted at 62, Danville hit five free throws for a 66-62 lead, but Plainfield went on a 7-3 run to tie it at 69. Lake gave Danville it’s last lead of the game at 70-69 and a Motter 3-pointer tied the game at 74-74 with 51 seconds remaining.
Plainfield’s burst at the end and ability to stay calm in a tense situation sealed the game. Riley Blackwell led Plainfield with 17 points as Casteel (13) and Wilson (11) also finished in double figures.
Newby tallied 16 and Lake had 13 for Danville, as Motter also pulled down a game-high 10 rebounds.
Plainfield takes on Brownsburg, winners of the last four county crowns, at 6 p.m. Saturday in the championship game at Tri-West.
— Follow Hendricks County Flyer sports editor Jake Thompson on Twitter @JacobEThompson.