故事发生在二次世界大战期间，沃尔特（盖瑞·马歇尔 Garry Marshall 饰）是曾经风靡一时的棒球明星，如今，早已屈居二线的他决定组建一支史无前例的女子棒球队。他看重了漂亮高大的多利（吉娜·戴维斯 Geena Davis 饰），多利的妹妹基特（罗莉·佩蒂 Lori Petty 饰）也跟随着姐姐的脚步加入了球队。 之后，马拉（梅根·卡瓦纳芙 Megan Cavanagh 饰）等一干得力干将的加入让球队的实力瞬间增强，在几次挫折之后，沃尔特的“娘子军”逐渐得到了体育界的认可。可是，就在这样的关键时刻，棒球队里却发生了内讧，马拉和基特离队，沃尔特也产生了放弃的想法。就在这时，多利远赴战场的丈夫鲍勃（比尔·普尔曼 Bill Pullman 饰）的归来让棒球队看到了新的希望。
Elderly Dottie Hinson (Anne Cartwright) is a former player on the nation's first women's baseball league in the 1940s. As catcher for the Rockford Peaches, she helped break gender barriers and earn nationwide respect for herself and the teams. Recently widowed, she nervously prepares to attend a reunion with her former teammates, including her younger sister Kit, also a league player, who Dottie rarely sees. She arrives in New York, and ss she stands at the gate of Doubleday Field the memories flood back.
In spring of 1943, the United States is at the height of its involvement in World War II. The draft has claimed the best talent from Major League Baseball, including Joe DiMaggio, Ted Williams and Bob Feller. Walter Harvey (Garry Marshall), a candy bar mogul and MLB team owner, holds an owners' meeting to determine what they should do if the American and National Leagues deem it necessary to shut down. He enlists one of his marketing gurus, Ira Lowenstein (David Strathairn), to come up with a solution.
Some time later, one of Harvey's talent scouts, the sarcastic and often rude Ernie Capadino (John Lovitz), comes to Willamette, Oregon, to a farm-based co-ed fastpitch softball league. This particular game has the home team, Lukash Dairy, down by one, with two men on and one out in the bottom of the ninth inning. A young lady, Kit Keller (Lori Petty), is on deck. Before she goes to the plate, her sister, the aforementioned Dottie Hinson (Geena Davis), points out a gap in the infield that she can hit through, to tie or possibly win the game. She also warns Kit to lay off high fastballs, a pitch Kit claims to like but Dottie knows she can't hit yet. Sure enough, Kit swings at two fastballs, then takes a changeup right down the middle to strike out, drawing sneers from the crowd.
When Dottie steps up to bat, she takes a ball inside, then swings at and hits a ball right in her wheelhouse, sending it to the outfield wall. As she stops at first, the two players on base score, and they win the game. Ernie takes note of her patience at the plate, and decides Dottie would be perfect for the league due to both her talent and her "dolly" good looks. Dottie is also married, with her husband Bob fighting overseas in the Pacific.
Kit clearly has a rivalry with Dottie, believing that their parents (and the rest of the town) see her as inferior to her older sister. Dottie denies it, but she also has a competitive streak that urges her to outdo Kit. As they are milking the cows at their parents' farm, Ernie Capadino finds them and offers Dottie a tryout for the upcoming league. Dottie initially declines, but Kit desperately wants a chance to prove her talent. Ernie rebuffs Kit as he had seen her poor batting at the game, but Dottie explains that Kit is a great pitcher and it wasn't her turn to pitch that game. Ernie pats her on the arm, explaining that he doesn't need her but changes his mind when he sees that Kit has strong muscle tone in the upper part of her pitching arm. Ernie strikes a deal, offering Kit a tryout if Dottie attends too. Dottie eventually gives in.
