You are armed with a ghost zapper, an EMP based weapon that draws on your energy when fired. Blast all those ghosts you come across to complete your mission. Don't expect it to be easy though, they'll be up to all sorts of tricks! They say it takes a thief to catch a thief, and you're a ghost yourself so it shouldn't be so tough for you. As a ghost, you can walk through walls, though at the expense of your energy.
