Based on Disneyland's theme park ride where a small riverboat takes a group of travelers through a jungle filled with dangerous animals and reptiles but with a supernatural element.

Adrián, an aspiring and talented orchestra conductor, receives a video message from his beloved Belén, telling him with tears in her eyes that she is leaving him and that she cannot carry on with him. Shattered by the unexpected news and puzzled by the inexplicable decision, Adrián gets help from the local Police to solve this case of disappearance. Time passes by and still no news of Belén's whereabouts, so life gradually begins to return to its normal pace, when out of the blue, a new woman appears in Adrián's life. With no progress at all in Belén's case and all things possible, no one will be able to see beyond the facts and comprehend the truth that often lies hidden in the most unusual of places...

2013. A mysterious epidemic spreads across the planet; humanity develops an irrational fear of open spaces which causes death within seconds. Soon, the entire global populace is trapped inside buildings. As Barcelona descends into chaos, Marc sets off on a quest to find Julia, his missing girlfriend - without ever venturing outside.