Legend tells of the Something, placed in the Vault of Somewhere back in the Way Back When by the People, for Reasons.
No, seriously, that's what Legend tells (when you get enough wheat beer into him, that is). The Something is powerful, terrible and awesome. The Something is myth, and the most desired object in all of creation. Wars have been fought over maps that claim to show its location. Blood has been shed, and lives lost, all in the name of an object that may or may not exist.
A group of five stout and brave companions set out on a Quest to find the Something. Their motivations were pure, and their eyes set on glory, sure that fortune favoured the bold. They never came back.
The local Lord - Lord Blackington Badstock - sent out a group of five to hunt them down before they could do it. They weren't exactly stout (except one, but that could just have been self-delusion), and they weren't brave, just well paid. They, too, never came back.
This is where you come in. You five are the only ones I could convince to listen to my story. Whether you are stout or brave is up to you - I honestly don't care. What's important is that you're listening, and I need your help keeping it out of the hands of Lord Badstock, or he will use its power to rule the world. You're my only hope.
The Search for the Hunt for the Quest for Something is a five player tabletop with uncertain destinations, ineffable motivations and inevitable betrayal.