[PTTG]

Cloning and neural structure imaging have cured mortality. When you die, you get a new clone activated from your latest backup. Society has stabilized, and the economy is booming because skilled workers stay skilled and the "dross" of society died out of old age.

All of which means it really sucks when you didn't actually die. 'Spinoffs' are rare; it takes pretty unusual situations to get someone marked as dead without a confirmed corpse, but it does happen.

PCs could be spinoffs trying to survive in a world which generally doesn't recognize their status and doesn't know how to deal with them, or they could be counter-spin agents, sent to fight a cell of underground spinoff terrorists.