chunk: The beginning of the movie shows icemen harvesting ice. A young boy named Kristoff and his pet reindeer, Sven, is among them ("Frozen Heart"). Elsa, Princess of Arendelle, possesses cryokinetic powers, with which she is able to produce or manipulate ice, frost and snow at will. One night while playing, she accidentally injures her younger sister, Anna. Their shocked parents, the king and queen, seek help from the troll king, who heals Anna and removes her memories of Elsa's magic. The royal couple isolate the sisters in the castle until Elsa learns to control her magical powers. Afraid of hurting Anna again, and with her ability to control her powers deteriorating, Elsa spends most of her time alone in her room, refusing even to speak to Anna and a rift develops between the sisters as they grow up; when the girls are teenagers, their parents die at sea during a storm ("Do You Want to Build a Snowman?").