Carter is having back problems that aren't helped when Abby asks him to help move a new fish tank into Luka's apartment to replace the one she accidentally broke while moving out. Benton encounters problems finding a sitter for Reese when Jackie decides that she can't do it. Chen is having trouble with Weaver "helping" her with patients; she treats an abandoned infant with a birthmark in the shape of the sign of the Virgin Mary. Cleo's HIV test results come back negative. Rachel Greene shows up at the hospital; she ran away from Jenn and wants to stay with Mark for a while. Corday falls asleep in surgery. Malucci is stuck in an elevator with a cute female paramedic and a guy vomiting blood. After saving the guy's life, Dr. Dave is caught "celebrating" with the paramedic in the back of an ambulance by Weaver, who promptly fires him. Appealing unsuccessfully to Mark, Dave and Weaver finally have it out at the end of the day. He begs her not to fire him because he needs the money