As Marvel's Spider-Man 2 unfolds, Peter Parker and Miles Morales are faced with their greatest threat yet. Miles is doing well as a budding superhero, maturing in New York and honing his abilities. But he's quickly caught off-guard by Peter's addiction to the alien symbiote. However, while Miles and MJ help get the black suit off Spider-Man, a greater danger arises.
Source:https://www.cbr.com/spider-man-2-who-is-scream-symbiote/