Two Knocks

The witch doctor said to never open the door when you hear only two knocks. The usual person knocks many times when he's in a hurry or knocks more than twice when nobody opens the door after the first try. If it's only two knocks, then don't ever expect it's a person.

"It disguises its voice. You hear it as though he's your neighbor or friend," the witch doctor added. "Be sure to see first before opening the door." His eyes rounded and it made her chill. "Because if you open it, you will see nobody in the doorway. You won't see it slips in. At night, it will fulfill its purpose. To seize all the ghosts in this house. Spirits that never have justice at all."

Myles froze. She felt warm blood creep on her back.

"Here," the witch doctor offered Myles a small transparent sachet of something ground, "take this and this will temporarily protect the house from it. Burn this tonight."

"What's this?" asked Myles.