35 year old Kelly Severide, a lieutenant for Firehouse 51, Squad 3 never found his loved one, after his ex- fiancé Chelsea(made Up) left him. Let's just say he does but he will love her like a daughter, which in the end she really is Severide's daughter. Taylor a very athletic and the smart 13 year never knew her father. A fire starts at the school and Severide is the one who saved her. How will they figure out they are father-daughter, or will they figure it out when local firefighter's daughters are being targeted, and Taylor is next.