Baretta's young partner is ostracised by his Gypsy family for refusing to perform an atonement ceremony after accidentally killing his younger brother during a robbery.
Baretta tries to find out why a laundry owner, who happens to be engaged to his cousin, refuses to identify the two men who held up his store and killed a cop.
On temporary duty with the vice squad, Baretta learns that his partner is taking bribes, and is ordered by his boss to investigate the other officers on the squad as well.
When a former girlfriend shows up with a baby named after him, Baretta plans to marry her until it turns out that she is a pawn in a power struggle between two mobs, with an assassin on her trail.
When his friend Billy is one of the hostages taken by robbers trapped at a roadside tavern, Baretta tries to negotiate a deal between them and a sheriff who is unwilling to concede anything because of his political situation.
Two elderly neighbors of Baretta's steal a million-dollar racehorse back from the thief who originally took it, then hide it in their apartment until they can claim the reward.
Baretta does a lot of soul-searching after wounding a boy while trying to stop a holdup. Then he himself is targeted for revenge by one of the robbers who escaped.
War veterans are being blamed for a series of bombings that are actually the work of a wheelchair-bound bomber who is attacking buildings and transportation systems without handicap access.
His concern for an elderly amnesiac interferes with Baretta's investigation of a schoolyard drug pusher who is responsible for several overdose deaths.