A few years after the events of "They call me Trinity", Bambino and Trinity meet up again at the house of their parents. Bambino is still pissed off because he got through the majors herd of cattle thanks to Trinity. So he is not happy to see Trinity, but he has to give the promise to his dying father that he will take care of Trinity and make him a decent horse thief. On their way the two brothers want to rob a carriage, but this goes wrong, because they don't want to take money from the family. On the contrary, the attack develops so that the brothers repair the family's carriage. Since the baby of the family also has to see a doctor, Trinity can persuade Bambi to "send money". After the raid, the brothers ride into a city where the poker professional and pistol hero Wildcat Hendricks is on the run. Trinity starts a poker game against him. He wins all the money from the pitiful Pistolero. Trinity and Bambino invest the money they've won in decent clothes. As soon as they wear these, they meet the family they wanted to attack before. They are joyfully recognized. To distract the attention from the fact that he is actually a bandit and to impress the pretty daughter, Trinity tells her that they are actually no bandits, but secret agents from Washington. This conversation is also overheard by a henchman of the big landowner Parker, who also has his hands in all sorts of sinister businesses. He immediately recognizes the danger posed by the brothers and decides to bribe them to keep their eyes closed. Trinity and Bambino are happy to accept the money and continue on their way to El Paso. The reputation of being secret agents precedes them. In the saloon, for example, they pick up a few of Parker's wanted ones and then collect the bounty from the corrupt sheriff, just to tell him to let them go again, a ritual that they repeat several times. During a small Tete-a-tete with the daughter of the already well known family, Trinity learns by chance that Parker uses the monastery of some peaceful monks for illegal arms deals. The prospect of the money from these deals and the dislike of Parker and his men leads Bambino and Trinity to take the side of the monks and give the bandits a few more slaps in the grand finale.
Just one year after the great success of They call me Trinity, Bud Spencer and Terence Hill slipped into the roles of Bambino and Trinity a second time.
Trinity is still my name was an even greater success than his prequel. It became the most successful movie of the duo Spencer and Hill and the most watched Italo-Western in film history. In Germany, more than 12 million viewers watched the film in cinemas. This makes it one of the ten most successful films of all time.