Arizona is stunned when her longtime patient‘s parents offer the hospital a donation of twenty-five million dollars, but when her patient‘s condition worsens, all eyes are on her to save him. Cristina tests her relationship when she blatantly disregards Owen‘s orders and performs an unauthorised cardiac procedure, then later kisses Mercy Wester Jackson Avery at a surprise party for Arizona. Alex cares for a struggling newborn while Izzie remains missing. In the wake of great grief, Arizona and Callie take their relationship to the next level.