Kairo

Un poco de terror japones, esos japos tienen buenos thrillers

Wikipedia dice:

The plot centers on ghosts invading the world of the living via the Internet. The film is a philosophical exploration into the alienation and loneliness of modern existence thanks to technology and more specifically, the internet. Communication breakdown and isolation is the main theme of the film.
The film - which is set in Tokyo - features two parallel storylines whose surviving characters meet up towards the end.
Parte 1 — Parte 2
Parte 3 — Parte 4
Parte 5 — Parte 6
—– Parte 7 —–