While Greer and Benga explore the vast nautical graveyard, Chuck slowly succumbs to the poisonous bug bite he received when they first landed on the island. Meanwhile... Keller, Marcus and Matt do a little exploring of their own as they follow Sarah's trail into the underground temple...which as it turns out isn't a temple at all but something far more bizarre -- something that could hold the secret to answering the mysteries of the island... More dark thrills from the creator of the Sci-Fi Network's EUREKA!