Hollie Halstead grew up an only child to an alcoholic, drug abusing mother, so on the day of her eighteenth birthday she ran away, got a job and joined the fire academy.
10 years later her mom is a thing of the past and she follows her own dream. To make Squad. Once she makes this dream a reality she is transferred to Firehouse 51 and joins Squad 3 only to have her life put into danger in the first shift.