The movie takes place a few years after the events of the first film. Hellboy (Ron Perlman) is now a respected member of the BPRD (Bureau for Paranormal Research and Defense), but his peaceful life is disrupted when he discovers that a golden army, created by the ancient Celtic king Nuada (Dwayne "The Rock" Johnson), is about to be unleashed on the world. This powerful army, forged from gold and magic, threatens to destroy humanity.