Six months after escaping Mother Gothel and reuniting with her birth parents, King Frederic and Queen Arianna of Corona, Princess Rapunzel is unable to properly adjust due to her father's constant protection. When she and her handmaiden Cassandra sneak out of the castle, they come upon some black rock spikes that magically restore Rapunzel's long blonde hair. Rapunzel, Cassandra, Eugene Fitzherbert, Pascal the chameleon, Maximus the horse, and a young alchemist named Varian uncover the mystery of her hair's return and its connection to the black rocks growing around Corona. Eventually, Rapunzel learns that the Sundrop Flower's power resides in her with the black rocks directing her to the Dark Kingdom.