Mark Harrison, haunted by the unexplained death of his brother years ago, invites his estranged group of college friends to the remote island where it happened. The group once shared close bonds, but time, guilt, and secrets have fractured their relationships. Mark is determined to confront the past and find the truth about what happened to his brother, no matter the cost. As strange phenomena begin to unfold on the island, the group realizes they are not alone. Each member is forced to confront their own guilt and buried secrets as the ancient, malevolent force within the island temple begins to tear them apart.