Frank Black discovered that Claudia was missing again. He searched her house, and quickly found a note directing him to an old building. On the door to the building, there was yet another note. It said:

When you open this door, you will find another three doors. You will see a sign on each door. Choose the right door, and you will find your precious Claudia. However, if you choose either of the two incorrect doors, you will feel my bolt gun and face a painful death. Do not be hasty, remember, the signs may be true or false.

Frank stared at the signs on the doors.