Members of a severely injured family are sprawled across a narrow mountain road. Meredith orders a teenage girl, Lily, to care for the baby they were transporting while she and Alex tend to the accident victims. The grandmother is dead and Lily's sister has a shard of glass in her eye. The youngest son is still trapped under the car. Another vehicle is headed right for him. Meredith jumps into the middle of the road to stop it just in time. Help has finally arrived.
Meredith, Bailey and Ben operate on a tear in the young boy's liver. When the kid starts to code, Ben realizes the patient is about to go into organ failure unless they ice him down right away. It's a good call and a great save. It also alerts the team to a genetic condition so that could affect the procedures being done on the rest of the family.
Meredith tries to revive the mother of the family at the hospital even though all hope is lost. Lily watches her mom pass away from the observation window. Her dad is also in extremely critical condition. The guy keeps coding. His body fails a little more each time they revive him. Lily turned 18 during the few hours she's been at the hospital. That means she's legally allowed to make the difficult decision to let her father go in peace.