The 11.11. in Mainz, carnival, state of emergency in the carnival stronghold! Both teams from the Mainz 1 police station are on duty that night. Lena Bottlender and her colleague Gerwin Schwiersch, Sarah Schräder with Jonas Horder. The 11.11. It's a very special night for the four of them, there are a lot of people out and about and many of them are heavily drunk. Crimes, crimes and misdemeanors are increasing. The two patrol teams rush from operation to operation in their police cars with flashing lights.
Sarah Schräder and Jonas Horder find themselves in the middle of an argument between a group of young people and an older man. The fact that the latter of all people resists and becomes verbally abusive almost upsets even the otherwise calm duo - and puts the man in police custody.
Both teams are called to a burglary - a rather unusual operation on Carnival. At the crime scene, the situation puzzles them.
