Abby has a horrible birthday, beginning with meeting her new squabbling neighbors. She treats a young woman hoping to get pregnant by taking fertility drugs, and discovers that Luka is going to Bosnia for two months as part of the Doctors Without Borders program. Her ex-husband tells her that he's getting remarried just before she sees Carter and Susan sharing a private moment. She takes care of a young boy abandoned in the ER after the death of his mother. Paul Sobricki is admitted with a head lac, and Abby unsuccessfully tries to keep Carter from seeing him. Abby's day ends with her sharing a beer with her neighbor. Carter has problems of his own: his mother is back in town, just getting in the way and refusing to admit to her mistakes. He also meets with Chen, who reveals that she has the evidence to take Weaver down in the Marfan's case. Weaver and Lopez are an item until Sandy discovers that Weaver has not widely come out yet. Mark finds cigarettes and condoms in Rachel's room.