If the Queen of Spades is dealt face-up to any player at any point in the game, all of the cards are collected by the player to the dealer's left. All players re-ante into what has amassed in the pot so far and the hand is re-dealt from scratch. The game is reset but now, there is all of the money that has collected from the previous round of play.
Also, if the Queen of Spades is dealt face-down to any player, then it is wild in that player's hand, revealed at the end of the game. If the Queen of Spades is not dealt at all throughout the course of game, then it is played as standard seven card stud with no cards wild and no stipulations.