A crime thriller inspired by the story of Jiří Kajínek, who is considered the first assassin in the Czech Republic. Thanks to his escape from the Mírov prison fortress, he became a legend and also the most sought-after man in Europe. The five weeks he escaped the police are still shrouded in mystery. The film Kajínek is a strong story of the most famous prisoner in our country, a story of a double murder, a story of a lawyer looking for new evidence, a story of the underworld and its penetration into the state administration and a story of manipulation. Is Jiří Kajínek a victim of a conspiracy or a cold-blooded killer? Are they trying to prove their innocence or intimidate and influence witnesses?