Help!! I missed the last fifteen minutes.

You're in luck, just watched it yesterday myself.
The people of the town discover a burnt dead body and decide to set the palace on fire. Vincent manages to resurrect his dead love. The wife and the doctor run into the house to save Vincent. They find the secret doorway and discover his dungeon and a Lovecraftian creature below the grate.
Evil Vincent comes in and with the help of his crew captures the wife and chains her above the grate, presumably wanting to sacrifice her to the creature.
The people set the palace on fire and burn the painting which makes Vincent Price good again. He releases his wife from the chains and tells the doctor to get her out of the house while he is held by his 2 henchmen. The doctor gets the wife out of the burning palace and comes back for Vincent, finds him alone lying on the floor, picks him up and gets him out. The people don't seem to want to murder Vincent. Then he starts talking in kinda of an evil voice "Thank you, oh I don't know how will I ever repay you, but I will try", his wife asks him if he's sure he's alright, to which he replies "Perfectly sure, my dear" *Lightning strikes* "Perfectly sure".

So the wife didn't go away but is alive, Vincent Price is alive but still evil, and his 2 henchmen and the love of his life just disappear.