I've got a character I need to poison, and I'm not sure how to do it. He's a king, and I'm setting it up by showing the poisoning being put in place at night, but I don't want the actual poisoning to happen until the next day. So I thought okay, character sneaks in, puts poison into his goblet of wine, he drinks it the next day. But then I think "what sort of king would just drink a goblet of wine that's been sitting out over night? Not this one." Or the assailant could spike a whole bottle of wine--but then I don't like the idea of anyone could become the victim of the poisoning, and I want it specifically targeted. I'm trying not to overthink things, but I'm sure there must be a simple solution that I'm just not coming up with. This is for a spec script I'm writing, so it needs to be as concise as possible, as few scenes and characters as possible. Ideas?