The main characters of the series are a pair of seemingly very different criminal detectives - Ema (Pavla Beretová) and Honza (Stanislav Majer). She is straightforward, rational and competitive, he is explosive, moody and takes everything personally. Ema decides to take part in the selection procedure for the head of homicide and, to the great astonishment of her future colleagues, she wins the it. The only serious competitor, Honza, is being investigated for shooting the perpetrator. The difficult role of being a mother and working in homicide keeps Emma prepared for difficulties. Honza is one of those who treat the new boss with a reserve. Solving cases, they become partners who complement each other professionally and not only... The topic of the episodes are inspired by cases that the police has been investigating in the Ostrava region over the past few years.