Every mercenary worth his money knows when he's being set up. So, you know you're being set up, big time, and that this entire party is going to blow up in your faces like a blasting-powder keg. This is going to be a catastrophe, you can see it coming. But there's solid gold on the table. And mercenaries, well, they're that funny sort that'll risk their life, limb and soul for a fistful of coin.
There's a song about what's going to happen. They call it Disaster Blues. So come on, let's sing.