Call taker Luke starts his shift at ESTA 000's ambulance call centre with a call from a frantic mother, who has tripped and dropped her young baby.

Police call centre operater Joel starts his shift in Melbourne with a panicked caller reporting two girls being attacked in a public park by eight males.

Louise starts her night shift at the Operations Centre of Brisbane's Ambulance with a caller reporting that a man has appeared at his doorstep, having been stabbed in the chest by a samurai sword.