A remake of the 1970's British thriller of the same name. The original is set in France and has two British females as the leads, whereas the remake is set in Argentina and has two American females as the leads.
The plot has many similarities with the 2004 disappearance of Swiss cyclist Annagreth Würgler, who vanished during a bike ride in Argentina after separating from her friend.
While her character can barely speak Spanish in this film, Amber Heard is fluent in real life.
The girls visit a bar called Bar La Paloma. Paloma is the name of director Marcos Efron's older sister.