Sodor is a place where steam engines can live & work happily, but all that change when a explosion happened at a nuclear power plant that was built at the Little Western and starts chaos throughout the entire island and infecting some of the engines. Now, Duck & Oliver must find a way to end this infection, find some of their friends, & must survive from two savage, infected monsters that were once their friends.

The year is 2021, And a large black cloud hit the island of Sodor. Follow Nigel Heartson, As he, Murdoch and Andy/Class 40 return to the island only to find their home different. Based on "Sodor: The Grey Lands" by Mr. Sunken