In search of brotherly connection, 12-year-old Beto skips his first day of school to follow Ramiro, his apathetic older brother. A carefree outing on a scorching late-summer day in Mexico City is abruptly interrupted when they discover that their father is having an affair. The weight of the secret fractures the family's fragile harmony, as a storm – both emotional and literal – forces Beto to decide whether to remain silent or confront a painful truth.