Nights: Journey of Dreams is an action video game developed by Sega Studios USA and published by Sega for the Wii. The sequel to the 1996 Sega Saturn title Nights into Dreams it was released in Japan and North America in December 2007 and in Australia and Europe the following month. The story follows two children William Taylor and Helen Cartwright who enter a dream world called Nightopia. When their nightmares come to life they enlist the help of Nights an exiled "Nightmaren" as they journey through Nightopia to stop the evil ruler Wizeman from escaping into the real world.