"Jinkies, gang! What the @#$! happened here?" Wouldn't you like to know. It doesn't have to be a murder - even a murder the cast is accused of committing before the Teaser's even over. But that happens.
Pros:
This is a pretty consistent winner.
Cons:
You kinda have to know what really happened before play begins.
Fate Value: 1-10 - it all depends on how hard.
Example:
"You are staring at the body of Captain Mighty, hero of this great city, until earlier tonight when he was shot, stabbed and burned by energy rays. Hey, you guys have guns, swords and energy powers, don't you? Hmm. Anyway, your challenge is to find out who or what killed him. And yes, those helicopters you hear are from the police."