The blood of Extropia's anarcho-capitalist society is its contracts. Every formal agreement or relationship is (or is supposed to be) laid out in a contract to which relevant parties all agree. Even contract enforcement is contract based, being carried out by freelance magistrates and voluntary-membership legal systems.
Extropia is a society of fast actions and rapid response. Professions, businesses, and industries rise suddenly and then change or die. Competition is ever-present and merciless, and if you aren't cheating, you aren't trying to win. Even in a society without laws, there can be a sort of crime.
For those willing to burn rep for credits or credits for favors, there is an underground profession of freelancers (or teams of freelancers). Linked by networks of trust and anonymity, they exchange deniable wealth in exchange for off-contract work, sabotaging, stealing or killing on behalf of anonymous clients.
Plot Hook: While in line for the public makers, the PCs are interrupted by a night cartel hit squad, attempting to assassinate the infant, unauthorized clone of their boss, held by one of Pax Familae. Intercede on behalf of either party, and the PCs will gain some g-rep and an offer for further work.
Plot Hook: Metacelebrity Ecstasy has been abducted in a bizarre and violent attack. Unfortunately for the PCs, they had been hired last weekend to prevent Ecstasy from making an appearance by temporarily kidnapping. The best way to clear their names is to track down the new kidnappers themselves, although all the rumors point to a dangerous clade of gestalt-mind exhumans.
Plot Hook: Three unusual prototype cyberbrains were recently stolen from a secure storage facility. These prototypes alter the personalities of anyone sleeved into them so as to match a template. In this case, the templates were for reconstructions of Cleopatra, Genghis Khan, and Jack the Ripper. The PCs are hired to retrieve the brains before their existence becomes public knowledge.