A year into his superhero training under Peter Parker's mentorship, Miles Morales has settled into life in Harlem alongside his mother Rio, only to find himself thrust into the role of New York's primary protector when Peter departs to aid Mary Jane overseas. His transition to solo duty arrives with brutal timing, as a dangerous corporate entity called Roxxon Energy Corporation launches a controversial new power source called Nuform into the market, triggering an immediate violent clash with a technologically advanced criminal faction known as the Underground. Led by the enigmatic Tinkerer—a villain whose identity carries personal significance for Miles—the Underground's assault threatens to destabilize his neighborhood and tear apart the fragile equilibrium he's built. Balancing his newfound mantle as Spider-Man with his mother's political aspirations and his own community obligations, Miles must uncover what truly lies beneath Roxxon's experimental agenda while determining whether the Underground's uprising is merely criminal opportunism or something with deeper roots.