Nights of Azure is an action RPG set in the kingdom of Ruswal, a mysterious land where nights are tormented by azure-blooded demons. Players control protagonist Arnice, a powerful knight with great skill and power who is joined by her friend Lilysse, a priestess. Together they embark on a quest to rid the island of these monsters but find out that the solution might not be as simple as defeating enemies alone. Along their journey they will face difficult decisions that could test their loyalty to each other and to their mission.