The visitors arrive by helicopter and discover the chalet and the 15 secrets. A murder ensues: the first person is murdered.

The first visitor to be murdered tries the Round Trip. With alliances, confessions and the discovery of IQs, the experiment intensifies.

The stakes are raised as a secret is revealed and the plans of some are derailed after a devastating defeat.

A call unsettles the visitors before a tense clash and a crucial test. Thomas, meanwhile, is looking to raise the stakes.

Tensions flare during an argument, before a trying confrontation and a lie detector reshuffle the cards.

Everyone is focused on the finale, but before that, a visitor escapes and the individual challenge does not go ahead as usual.

Any strategy goes and it shows. After an intense confrontation, Thomas reveals clues to certain secrets.

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