Spider-Man is a masked superhero invented in 1962 by Stan Lee and Steve Ditko and published by Marvel Comics.
Peter Parker is a boy who attends Midtown High School and lives in Queens with his Aunt May and his Uncle Ben with whom leads a happy life without too many worries. At school, however, he is teased by other students and often left alone, given his state of "nerd". Peter is in fact an introverted boy, he loves to study (especially science), he is slender and bespectacled and so very different from his classmates.
One day he decides to go to a sciences demonstration on radiations, but he is bitten by a radioactive spider and so he acquires the agility and proportionate strength of an arachnid. Peter discovers that he has acquired the supernatural powers as the ability to climb on walls, a highly developed hearing and a great force.
To further test his powers the boy decides to challenge a fighter in the ring with a rudimentary mask. Winning in seconds and impressing the audience, Peter is hired by a producer to appear with his powers to the tv in a hit show.
One day, after a show, Peter has the opportunity to stop a thief who just robbed the studios but, blinded by success, let him run away not even trying to stop him. But that same thief, days later, seeking the spoils of a gangsters in the Parker's home, is surprised by Uncle Ben. The thief shots and killed Uncle Ben and runs away taking refuge in an old warehouse.
Arrived home, Peter discovers the terrible news, infuriated, he dresses as Spider-Man and attacks the thief, defeating him and handing it to the police. The boy discovers that he is the same thief who had left flee days before and so Peter understands that "With great power there must also come great responsibility!". Then he promises to himself not to let escape never any criminal, making him a real superhero.