Abby is flabbergasted when Maggie reveals her plans to move back to her birthplace of Minneapolis. Abby reveals to her mother that she was pregnant once, but had an abortion, scared about the genetic possibility of herself or her child turning out bipolar. Meanwhile, Carter and Chen are both shot down in their bids for chief resident, after which she tells Weaver she is a victim of discrimination. Weaver meets Legaspi's new girlfriend. Carla hits on Benton and freaks out at Cleo after she turns her back on Reese for a second and he injures himself. Mark treats a young abused boy with an extremely irate father. Most of the ER staff play in a softball game after work.