As a Spider-Man, the young boy Miles Morales has many responsibilities to keep the city safe from any danger and to study at his high-school too. He believes that he is the only one who has this superpower. Things change when he discovers many Spider-Men inside the Spider-Verse. Then, Miles knows that those are his counterparts from other dimensions. All of them have to cooperate and work together to face an upcoming danger that may put the whole world at stake.
The move is a blast and, by using a plot device that causes a rift between different dimensions/universes, Into the Spider-Verse has been given an incredible amount of latitude in terms of characters and style.