Like the original French version, although Secret Story is not a direct adaptation of the Big Brother franchise's format, created by producer John de Mol in 1997, the show has a similar concept while including its own game mechanics, and is also produced and owned by Big Brother's production company Endemol Shine Group/Banijay.

The housemates are completely forbidden from any contact with the outside world, also cancelling television, radio, internet, music, books, or pencils, among other things of lesser importance.

Additionally, at the beginning of the season, a draw is held with 16 spheres, one of which contains 50,000 euros that will be awarded to one of the contestants - the one who proves to be the best investigator - without knowing it until the end of the competition.

When a contestant is expelled without their secret being revealed, their sphere is put at stake through a test or left as an inheritance to the person of their choice.

In addition, throughout the program, a phone appears from which "the voice" or the presenters themselves can offer privileges or counter-rewards to contestants who answer (immunity, direct nomination, etc.).

Each contestant receives a weekly budget to purchase food and other products, which will vary depending on their performance.