"Four players have keys on lanyards and are locked into cages on pontoons. A fifth swims out to the nearest cage and unlocks it with their own key, releasing the prisoner, who crosses a set of small platforms to the second, and so on. Once all four prisoners are released, the final prisoner and their rescuer get into a waiting boat with the sixth player, who has a bunch of keys, then the three row to shore picking everyone else up on the way. These six form a human pyramid on the beach, and the person on top uses the key ring to unlock a hanging cage containing the seventh and final tribe member." ~ @SurvivorWiki
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They receive a message in a bottle.
The message states that they can keep immunity or give up immunity to keep the luxurious camp.
They give up immunity so they can keep the luxurious camp.
Proceed to tribe events.