Nine young friends get lost on their way to spending April Fools Day together. Instead of letting the entire trip go to waste, they decide to go party at an old abandoned inn called 12 Hills. Rumor has it that the place has curse that comes to life every April 1st. Despite the warnings from the locals, the friends decide to go ahead with their April Fools Day plan. It's all partying, sex and alcohol until victims of sick, deadly jokes start to appear.

In 1984, three children were abandoned at a Barcelona train station with no memory of their identity or past. Unclaimed, they were adopted into loving homes. As adults, they now search for their biological parents.

After being complicit in a costume joke that ends in a fatal accident and a pact of silence, a group of young people will be threatened by an anonymous writer who wants to reveal his dark secret. Their stalker threatens to post a bloody horror novel based on them on social media. Each chapter one of them will die. While distrusting each other, the group will begin a fight for survival in the middle of the university campus. Any one of them could be the next victim, or the killer.