The Infestation threat has broken the boundaries of time and the Lovecraftian monsters invade the world of Transformers: Hearts of Steel! It's a steam-punk world in the grips of panic as terrifying beings from the depths of the ocean corrupt both humans and Decepticons! Only one man knows how to stop the Infestation, and it's up to him to awaken the Autobots in time to prevent full-scale cataclysm!
— Description from Comic Vine community (comicvine.gamespot.com).
