Pedro leaves his poor village and finds work drilling a tunnel through an area of exceptional natural beauty that is to become a luxurious hotel complex. But mysterious forces are working against the project. When a landslide blocks the entrance to the tunnel, Pedro is left trapped. Mia, his daughter, decides to go looking for him but she has to cross the cursed forest. Meanwhile, the brash hotel promoter is alarmed by the discovery of a huge footprint and other incidents on the site. At the worst possible moment his investors decide to pay a visit. To make matters worse he is forced to bring his young son along. Mia enters the mysterious, almost fairytale world of the forest which will lead her to encounter the mysterious Migoo.