The bizarre and brutal murder remains a mystery. Could it be a ritual killing? With a killer on the loose, Inverdee is in great danger…

Dr Symonds has been brutally murdered. Are the killings linked to the other strange incidents on the island? Michael wonders at the identity of the murderer.

The film from Dr Symond's camera reveals the hideous nature of his attacker. The coastguards fight for their lives against an otherworldly threat.