Finding a Hidden Immunity Idol on Survivor is a castaway's best-kept secret. Put simply, having one in your possession means you can present it anytime at Tribal Council to secure your safety through to the next week.
See what happened when Kelley Wentworth found a Hidden Immunity Idol under the shelter.
Watch all past seasons of Survivor on CBS All Access.
Plus, don't miss the season premiere of Survivor: Game Changers on Wednesday, March 8 on CBS and CBS All Access.