Félix e Sol fazem uma viagem em família com seus dois filhos de 12 anos. Ao pararem o carro em um posto de gasolina nas imediações de Tijuana, as crianças vão explorar as montanhas da região e desaparecem. No dia seguinte, elas retornam, mas o alívio logo dá lugar à preocupação: os dois passam a se comportar de maneira estranha, evitam a escola e causam sustos em sua babá. Félix e Sol tentam, então, investigar o que aconteceu naquele dia e irão se deparar com uma descoberta sobrenatural.

Aram is a wearied accountant with an unbearably dull existence. With a nagging wife who berates him for not being assertive enough, and a measly paycheck, he quietly suffers while awaiting a long-deserved promotion. But there's more to Aram than his mild-mannered demeanor lets on: he has been secretly devising a scheme to finally get what he feels he is owed. One day he asserts his power menacingly when he kidnaps a schoolgirl and keeps her tied up in an abandoned warehouse. What seems like the perfect plan soon unravels into his worst nightmare, and his carefully constructed scheme comes crashing down piece by bloody piece.

A young reporter is sent to cover an accident where some children fell into a hole. What happens next is simply indescribable.