"Fantastic Beasts: The Secrets of Dumbledore," takes place several years after the second film when Grindelwald is now more powerful than ever. He's gathered an army of followers who believe in his cause for wizards to dominate the world. Since we learn at the end of "The Crimes of Grindelwald" that Dumbledore is unable to fight his former friend due to a blood pact the two made when they were younger, Dumbledore entrusts Newt and his friends to thwart Grindelwald's plans once and for all.