While investigating a murder, Rex and his partner Inspector Fabbri uncover an illegal dog fighting operation involving stray dogs.

After a bad fall during an illegal motorcycle race, Stefano Bianchi dies on the way to the hospital. Since forensics confirm that his bike had been tampered with, Inspector Fabbri and Rex are called in to investigate his murder.

The murder of night club singer Daria demands special commitment from Inspector Fabbri, as she was a close friend of Fabbri's on-off girlfriend Katia Martelli, a forensic expert and part-time singer.

Inspector Fabbri and Morini and Rex team up with the secret service to join in the hunt for a terrorist who has threatened to blow up a local conference.

Inspector Fabbri and Rex are called to investigate the death of rich kid Tony, who has been stabbed at his birthday party while his friends were watching a fireworks display.

When Countess Clotilde Sanfelice falls to her death from a window of her house in front of two horrified witnesses, a homeless woman who is seen fleeing the house is suspected of having murdered her. Rex and Inspectors Fabbri and Morini investigate the suspicious death.