The Billion-Dollar Test: Find My Brother Who Doesn't Exist

After her grandfather dies, Clara and her parents travel to a remote island manor to claim a billion-dollar inheritance—but the will demands one impossible thing: find her brother, whom she never had. Trapped by the estate's rules, cut off from the world, and haunted by repeated unexplained deaths, the family spirals into fear and suspicion. As the house reveals buried memories, Clara questions everything—her body, her family. What is the truth behind the missing brother?