The commissioner who loves a murderer. Two spouses, one thought: Die! She wants to be free, he wants to remain rich. She falls from the ladder, he crashes his car into the largest tree of a Lower Rhine avenue. So much misfortune is no coincidence. The Wesel K1, led by Chief Karin Krafft, stirs up a hornet's nest and uncovers tax fraudsters. They fight back with all means to protect their business methods. The trail leads from the Lower Rhine to the Netherlands. At the same time, K1 faces a test of endurance. Because the headstrong commissioner Gero von Aha falls in love. With a murderer. Or is she also a victim?.