Taking place after Sonic Forces, Sonic Dark Shadows tells the story of Sonic and his friends, as they're forced to once again fight the Dark Gaia Spawn, who have strangely reappeared, even though Dark Gaia has not been reawakened. What's even more strange is that a strange creature of the night has appeared, and Sonicverse Kylie Dear teams up with Shadow in order to discover the identity of the creature, as well as the cause of the Dark Gaia Spawn's reappearance. It's a story full of twists, turns, and terror.