Plum won a gold medal at the 2013 FIBA U19 World Cup and a silver medal at the 2015 Pan American Games. She finished her collegiate career at the University of Washington as the NCAA Division I all-time leading scorer with 3,527 points (25.4 ppg.), and she owns the NCAA single-season scoring record (1,109 in 2016-17) and the NCAA career free throws record (912).