Madrid, Spain. With the city buckling under extreme heatwaves and the authorities recommending precaution, Mario moves Manuel, his senile father, into his home. But living under the same roof with an aggressive, grief-stricken parent succumbing to dementia is a challenging task. And then, as Manuel's symptoms affect his behaviour and daily life, Mario and his family realise that other octogenarians follow a shockingly similar pattern. More and more, the city's white-haired citizens act weird, placing everyone's lives in harm's way. Is there more to the ageing population than meets the eye? Do the elderly sense something invisible to the youth's untrained eye?