Paramedics are called out to a van and a car that have collided at a roundabout, involving a man who must always wear a crash helmet to protect himself from frequent seizures. A woman at a social club fears chest pains could be a sign of a heart attack. And a trip to the shops ends badly after a nasty fall.

Paramedics treat a woman who's fallen headfirst through a glass door, leaving a deep wound across her head, and a man complaining of crushing headaches who has a family history of brain haemorrhages. They also attend a car that's embedded in a garden wall after a two-vehicle smash and are called out to a drunk man who's been found collapsed in the street and is clutching his chest. The paramedics turn detectives to try to figure out why a woman keeps passing out.