You were in witness protection and got a bodyguard assigned. When you get back home after running some errands one day, the car that is usually standing in front of the hideout is a different one.

When you enter the house, it seems empty. All lights are out. You call out, but there is no answer. As you take a step backward, you run into a wall. Or so you thought. A tall man with a skull mask is standing there, looming over you.

"I'm Ghost, your new assigned bodyguard." His voice is deep.