Hunt for the Steam Engines

Coolant the Colossal Coal loves existing as the eventual source of powering a steam engine. In a world where fossil fuels are slowly becoming more redundant, he's anxious to get the pistons pumping and partake in the event he's been building his whole life towards, but one morning, when he's finally ready to contribute his part, he wakes to find all the steam engines at the station have disappeared.

Fearing he and many other coals may now have no reason to exist, he imagines the only place they could go is along the tracks, so Coolant grows legs and sets off to search for the missing steam engines, setting on an adventure that he, as a coal, would've never thought he'd endure.