After his village is destroyed Ursus is sent away as an infant by his parents and he ends up being raised by lions. This sets up the story well.
Alberto Lupo is Ayak, a tyrant who has heard of a mysterious strongman living with lions and so he sends his men out to capture him. It becomes apparent that Ursus is the future leader of the kingdom Ayak is ruling now and he will not allow this to happen very easily.
There is a lot of action in this film and the print I saw was in black and white, but still very watchable. The plot is pretty thin, as is usual with these kinds of films.
Not a bad way to kill 90 minutes. especially if you are a muscle popper fan.