While a rumor about the presence of sharks in a small beach town distracts residents, 14-year-old Rosina begins to feel an instinct to shorten the distance between her body and Joselo's.

It's been four years since Sylvie's son Felipe was abducted by his father Pablo after their divorce. Having been let down by the French officials who had succeeded in tracking both them down, only to let them escape again, Sylvie has now decided to take matters into her own hands.

After being a victim of rape within their own home, Diana chooses to keep the trauma secret. Mario, her husband, also has something to hide. The silence takes the couple's account over the day turns gradually into a peculiar form of violence.

While her filmmaker husband works in Chile, harried young mother Liz struggles to take care of her infant son. Feeling out of place amongst the tight-knit group of other parents at the park, doubted by her husband, and judged by her newly hired nanny, Liz is drawn to factory worker Rosa, a plain-talking single mother she meets at the swings one day. Despite Liz’s liberation upon finding a bold new confidante, the friends’ increasingly apparent class differences, along with swirling rumors about Rosa’s motives and muddy family situation, feed Liz’s suspicions that her new pal might be a sinister influence on her already fragile life.