Earth-120703 is the reality that takes places within all of The Amazing Spider-Man films.
When he was young, Peter Parker's parents died in a plane crash, leaving him to be raised by Benjamin and May Parker.
When he was on a field trip in high school, Peter was bitten by a radioactive spider, and given enhanced agility, strength, and the ability to stick to walls. He then created web shooters for himself and donned a costume, taking the name "Spider-Man".
He met with Dr. Curt Connors and helped him finish a formula, which Connors would later use on himself, transforming him into a creature known as The Lizard. Peter soon makes it his duty to stop him.