The Sacrifice Box - Grand Format

They spoke the words - the rules of the sacrifice. "Never come to the box alone," they said, hands unmoving. "Never open it after dark," they said, fingers joined together. "Never take back your sacrifice," they finished - then let go. Sep, Arkle, Mack, Lamb and Hadley : five friends thrown together one summer. When they discover an ancient stone box in the forest, they each make a sacrifice - something special, committed to the box forever.
And they make a pact. Four years later, a series of strange and terrifying events take place. Someone broke the rules, and now everyone has to pay. But how much are they willing to sacrifice ?