[9] Her father earned All-American football honors and set the CIF San Diego Section career passing yardage mark at Helix High School in La Mesa, California, and went on to play football and baseball collegiately at San Diego State.

She went through fourth grade at a local Montessori school, but Plum, who has dyslexia, was bullied by her classmates, and was young for her class, felt unprepared to advance.

[15] Over her four years, her team had a record of 103–22, which led to four section titles and the 2012 CIF Division IV state championship.

She participated in the 2013 WBCA High School All-America Game, hitting six of her eight field goal attempts, scoring 14 points.

Prior winners include Kaleena Mosqueda-Lewis, Courtney Paris, Candice Wiggins, and Diana Taurasi.

[9] After Plum helped the USA basketball team to win the gold medal in Lithuania, she flew directly to Seattle rather than heading home to San Diego.

By going directly to campus, Plum was able to sign up for summer school classes and get acquainted with the university and her teammates before the fall quarter began.

Plum also led the Huskies on an improbable NCAA Tournament run, highlighted by their first Final Four appearance in program history.

The Orange would go on to lose to the undefeated 37–0 and three-time defending women's national champions Connecticut Huskies, 82–51.

During Plum's senior season, she became the all-time leading scorer for either gender in Pac-12 history, passing the former record of Stanford's Chiney Ogwumike in a December 11, 2016, win over Boise State.

[29][a] On February 25, 2017, in the Huskies' final regular season game, Plum scored a Pac-12 record 57 points in an 84–77 win over Utah.

The record-setting output also gave Plum the NCAA Division I women's basketball career scoring record.

According to ESPN.com, Plum was unanimously selected as an Associated Press All-American First Teamer, an honor only given to five players in women's college basketball.

Plum was also named the AP player of the year for women's college basketball, the first ever Washington Husky to earn the award.

[34] This marked the first time in history that the first overall pick from the NBA (Markelle Fultz) and the WNBA came from the same school (University of Washington) in the same year.

[35] Plum made her career debut on May 25, 2017, against the Dallas Wings, she scored four points along with one assist off the bench in a 94–82 loss.

[37] By the end of the season, Plum averaged 8.5 ppg and was voted on the All-Rookie Team, but the Stars finished with the second worst record in the league.

In the 2018 season, Plum improved in every statistical category, averaging more points, rebounds and assists with higher shooting percentages.

In 2021, Plum came off the bench and had a career year averaging 14.8 points, 3.6 assists, 2.5 rebounds, and 1.0 steals on 38.6% from the three and 94.4% from the free throw line.

[47][48] In 2017, Plum signed with Fenerbahçe of the Women's Basketball Super League (KBSL) in Turkey for the 2017–18 season.

She returned with Fenerbahçe for the 2018–19 season, helping the team win another KBSL championship and the Turkish Women's Basketball Cup.

[52] On July 15, 2024, it was announced that Plum would appear and play in the inaugural season of Unrivaled, a new women's 3x3 basketball league founded by Napheesa Collier and Breanna Stewart.

[53] In late November 2024, Plum announced via social media that she would no longer be playing in the 2025 Unrivaled season and instead would "take some more time for myself this offseason.

Plum competed on behalf of the US at the Tenth FIBA U19 World Championship, held in Klaipėda and Panevežys, Lithuania, in July 2013.

[56] She has been named a member of the twelve player squad representing the US to play Basketball at the 2015 Pan American Games in Toronto which will be held from July 16 to 25 at the Ryerson Athletic Centre.

Cuba missed its final shot to give the USA the win 65–64, propelling them into the gold-medal game against Canada.

Retrieved February 1, 2024. Stats current through end of 2024 season On March 4, 2023, Plum married American football player Darren Waller.

She also added that she has been fortunate enough that cigars have become a special indulgent tradition for her and that she has "had big moments to celebrate with a smoke each of the last two summers.

[92] Plum has come under criticism for smoking cigars, with claims being made that she is putting the health of children around her at risk and setting a bad example.

[93][94] Plum faced depression and suicidal thoughts during her career, and went so far as to sitting on a tall parking structure with her feet hanging over the ledge considering how her family would feel if she jumped.