Sudrian Nuclear Chaos

This Is A Rewrite Version of "Rosie and The Battle of D-Day", Since The Original Felt Crapy and Copied, so I'm doing this re-write in my way, also I'm not trying to copy any popular Sodor Aus, so I'll try my best not too.

Plot
In 1995, A 16 Year Old Girl Name Sophie and Her Sister Sam get a job on the Famous Island Of Sodor, As Engine Drivers for Rosie and Oliver, Then Sir Topham Hat assigned a new Power Plant that is unexpectedly build, then disaster strikes, The Power Plant Exploded causing innocent people and engines to mutated or killed, it's now up to the two little tank engines and their crews to survive, find survivors and stop whoever caused this, will they win?