When a young lawyer is murdered to cover up a dangerous corporate secret, his sister must face off against the ruthless killer sent to finish the job. Trapped by a severe thunderstorm in her family's secluded estate manor, she and a handful of friends must fight to survive nature's assault and that of the killer sent to silence them all for good.

• Nicholle Tom
• David Millbern
• William B. Davis
• Benjamin Arthur
• Ben Ayres
• Holly Dignard
• Margot Kidder