February 29, also known as Leap Day, comes around once every four years and is a cause for celebration. That is true for a lot of people, except for Day and Night. Every February 29, on their birthday, someone they love dies. But the year they turn 20, Day's cousin Ozone and Night's closest friend Dream survive the fateful curse. Day and Night must now work together to defeat their Leap Day destiny. Will this mystery be unraveled?