Simon is a compulsive liar. To his surprise, his family, his friends and his colleagues send him a collective ultimatum: he must learn to tell the truth. But Simon lives in denial and ends up telling a lie too much, provoking an exceptional situation: all the falsities he has told in his life become reality. Disasters follow one another to his dismay, and with the help of his twin brother and a new colleague, he will have to figure out how to get out of this nightmare.
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