After having had a somewhat conflicted and drugged adolescence, Ana has reached the age of majority and remains hooked on heroin. Her mother, Julia, has tried to help her daughter so many times that she has lost count, but Ana always ends up escaping from the rehabilitation centers. In February 1989, Julia makes the hard decision to send her daughter to a monastery located near the Picos de Europa, isolated from civilization with the intention of leaving it completely clean. What neither of them knows is that there will take place the suicide of one of the Sisters, which will lead to chaos and secrets known that should never see the light.