1) Brothers Jimmy and Jonathan find a magic medallion that supposedly grants wishes. Jimmy makes a flippant wish for £1 million as a joke.
2) The next day, their father dies in a work accident. As promised by the medallion, the brothers inherit £1 million from their father's life insurance.
3) Grieving and confused, Jimmy makes another wish using the medallion to bring his father back, which summons some unearthly presence. Jonathan makes a counter-wish to make it go away.