The Dark Gift

You woke up in the basement of your home and don’t remember anything...

When you go up to the house, you see the Christmas decorations and garlands and remember that it is family holiday time and time to get ready for it, while your wife and son went out to the store to do some shopping...

Suddenly the doorbell sounded. Opening the door, you see that someone left you a gift box...

What's inside this mysterious box?!