After the unexpected death of their father, three siblings are shocked to discover that they have been cut out of his will in favour of a mystery woman.

As the police investigate Dennis's death, the Watson siblings hunt for their father's previous will, trying to show his original intentions, and that his death was not accidental.

The body count starts rising as Sian finds a dead body at the family home. As the siblings discover more about what happened to their father, they hurtle towards a fiery conclusion.