Billionaire businesswoman Sloane is forced out on a cross-border M&A trip, entrusting her seven-year-old daughter Elara — who suffers from severe heart disease and wears an external pacemaker — to her husband Preston. But the vain Preston, eager to please his first love Monica, locks the girl inside the smart mansion and flies off to a Caribbean island getaway with his first love and her child. A storm knocks out the mansion's power, the door locks seize up, and the pacemaker can't charge. In three days of darkness, Elara eats the sour leftovers Monica deliberately left behind, and dies miserably amid extreme agony and a fully drained battery. When Sloane cuts open the mansion doors with heavy equipment, all that greets her is the stench of a corpse. Facing the scumbag still partying on the island, this all-powerful mother unleashes her cruelest dimensional strike and hellish revenge.
