As a hitman for the Blind Mafia, your work is to kill your targets, identifying them by their heartbeats. Replacing the sigth of the sniper rifle for a powerful directional microphone, you are able to carry this difficult task. Or that is the plan at least.
You get paid for well done jobs, and you get fined for your mistakes. You can buy add ons with your money but be careful. Mafia never forgets its debtors, not even the Blind Mafia.