Dr. Nina Haddad is the new emergency doctor at Mannheim Fire Station III, always in the front row with emergency paramedic Paul Raue. In a team with firefighter Markus Probst, fire chief Piotr Rogosa and the intrepid Billy Johannes, Nina experiences emotional ups and downs, dramatic emergencies and moving dramas. Every deployment presents medical challenges. Even though the world of firefighters is new territory for the doctor, she quickly realizes that behind the uniforms and sometimes harsh humor there are people who are not indifferent to the fate of others. Dr. Nina Haddad, a born lone fighter, finds that her colleagues are there for her. She experiences cohesion, team spirit and dedication of the rescue workers. For the team at Fire Station III, their daily work is not a job, but a calling.