Following the donut shop shooting, Veronica finds herself overwhelmed by PTSD. Accompanied by a disturbing visitor, she takes off on an impromptu road trip, leaving everyone concerned. Back at Mercy, the victims of a bus bombing inundate the E.R., causing Dr. Briggs and Dr. Sands to clash over the only available operating room. Chloe battles a hangover on her second day in the E.R., Sonia struggles to conceal her infidelity from Valentino and Dr. Harris treats a patient whose injury causes her to make inappropriate sexual advances.

Source: NBC