Following the events of Thanos and Chaos, Time Eater finds Eggman, and orders him to build him a new body. The gang has to go around to defeat a menacing threat.
In this, we're introduced to the gang again, as they're back on the ship before Thanos. They seem to do normal things around the ship, as they do their chores.
Limansk, Tails birth home, was a war-zone, and had a huge war between Robotnik against troops. Tails was born 34 years later, and as a result, was a victim of abuse by his parents.
When Shadow was first being created by Gerald Robotnik, the space colony got destroyed by S.W.A.T after finding out what Gerald has been doing. Shadow doesn't know this until later on the news team, that's when he fights Sonic.
Silver fights Nega for the last time, as his universe is in "grave danger". After he dimension travels, he figures out he's in an unknown dimension, which was Sonic's.
After Silver and Blaze joins their team, they go on a mission to save Honey from Eggman. They retreat and take Honey, as Eggman captures Bob, turning him into a mutant hedgehog, now reborn as Werehog.
Rouge decides to steal from a 7/11 after learning it has a chaos emerald. Espio and his gang were alerted that Rouge was stealing, but Espio instead falls in love with Rouge.
Knuckles not getting his origin, was instead replaced by Time Eater sending him back to his death of his father. Knuckles learns about the real truth of the death of his father, and how Chaos really started.
Sonic, our main hero, still lives with his parents. He discovers Robotnik's old bots from the Limansk war, and decides to show it off to Knuckles. Years later, he finally encounters his foe, Eggman.
After the events of ROTE, Time Eater decides to make his "own universe" to finally repel the heroes of Planet Earth. The Sonic Crew has to figure out a way to stop Time Eater before he does more damage.