About the AU
Flowey's Revenge is a three "arc" story following an alternate timeline where Frisk dies during the Omega Flowey fight on a neutral route, but never resets or comes back. So now Flowey rules the Underground, ultimate power finally his...
...until a new human falls down. Pravda is a truthful but nervous young man with untold power in the Underground.
Can the timeline be saved? Will Sans go insane? Will Pravda kill Flowey? Who will Pravda meet on the way?
Only time will tell.