Red Dead Redemption Undead Nightmare

[charles gunfury]

I got this game for Xmas and since i unwrapped it i beat it in to days but its a good game :P and i was wondering after u beat it and U get to play as Zombie Marston because i am very confused because i did all the missions found 2 of the four horses Horse of War, Horse of Death ( found at the end when u are zombie ) Cured all the towns , and now i am lost because i know who took the mask that does all this crazy stuff the the undead ppls but i don't know where he took it or where to go next can anyone help meh?