April has been living in the "Trappistines of the Strict Observance" for 21 years?She was abandoned at birth in front of this isolated convent and raised by the sisters. It is time for her to utter her perpetual vows. And Sister Bernadette cannot but reveal the most buried secret of the monastery : she was not abandoned on her own, there was also a boy, her twin brother... April decides to look for him.