Intruder

Having woken up this morning Fred found that all the doors and windows in the house were boarded up. None of his family members knew what was going on. Is it a parasite? Now his family is in danger. 

1.  Watch the behavior of your family, their behaviour may change. 
2.  Give the candle deliberately, because it can save your lives.
3.  Have fun?

SAVE EVERYONE!