They tell tales of worlds that can only wait for the Darkness to consume them after the time of the Traveler. Only recently after the destruction of the Black Gardens heart have word of a powerful shard of the Traveler began to reach The City. Three Guardians are tasked to go through the Darkness and retrieve it in order to turn the tide in the war with the Darkness.
The time of the Element of Harmony bearers have passed, their children beginning to fill their shoes. It isn't until the shard of the Traveler arrives within the Everfree Forest. The seven investigate and are soon gifted with the powers of the Light. It isn't long before they are soon thrust into an adventure with new allies and even greater enemies.
(Takes place before the events of The Taken King)
(Set in the Kiala-verse, Educate yourself before you read.)