The spirit of winter, Jack Frost, describes how he came to be hundreds of years ago, lifted from the ice by the Man in the Moon, and has been invisible ever since because people don't believe in him. At the North Pole,North, better known as Santa Claus, is alerted that Pitch, the Bogeyman, has returned and is threatening childhood with fear. After summoning fellow Guardians the Tooth Fairy (Tooth), the Easter Bunny (E. AsterBunnymund) and the Sandman (Sandy), North learns from the Man in the Moon that they are to induct Jack as their new member. Jack is brought to North's headquarters and they attempt to swear him in. Jack, frustrated by centuries of isolation caused by children's disbelief in him, declines to join. Regardless, North persuades him to cooperate for now by explaining their mission and the looming threat of Pitch.