Cast away with his children, Lucía and Matías, on a desolate beach littered by long forgotten shipwrecks, Ricardo desperately seeks to draw the attention of shimmering lights blazing in the sky behind the thick cover of clouds. Every day moves him closer to finishing the construction of a monumental lighthouse that could lead to their rescue, but he’s grown oblivious to the deepening mistrust his own neglect has fostered in his eldest daughter, whose own plans will confront him with the difficult choice between his dreams and his children.