When the bombs hit, ponies moved to the metros around equestria to shelter from the vast apocalyptic world above.
Ponies demanded more from the stalkers, but they didn't realise what was up there. Rainbow Dash has a mission to go to ponis, the central station of the metro to tell them of Flash Sentry's untimely lost. But is that all what it's all about?

(this story line will be similar to metro 2033's (game i haven't had a chance to read the book) story line but of course i need to change it up)