Hierro

Marine biologist Maria (Elena Anaya, Mesrine: Killer Instinct, Van Helsing) is heading to the isolated island of El Hierro for a holiday with her five year-old son Diego (Kaiet Rodríguez), but whilst on the ferry the boy vanishes. The search for the boy by the local police is unsuccessful and the obvious assumption is that the child has been swept overboard.
Six months later, grief-stricken Maria is called back to the island. A child's body has been discovered and it matches the description of Diego. Maria doesn't recognise the boy but the police decide to conduct a blood test. The authorities have to keep her on the remote island for three more days until a judge can come to approve the sampling of DNA from the corpse. But when her sister is called home, Maria is left alone on the island. Convinced that the boy may still be alive, she conducts her own investigation...

The atmospheric and intriguing Hierro immediately and firmly establishes director Gabe Ibàñez as one of the striking new visual talents to shake the ever-popular horror-thriller genre.