Figuring out who to trust is difficult when Ava can't even trust herself.

When Ava's only form of protection from bastard-eating monsters begins to weaken, she's forced to leave her home before telling the boy she loves how she feels. Along for the ride is her Nylo, a creature whose sacred bond gives her healing abilities not everyone understands or accepts.

On her journey through the Cache, Ava learns a new way has been created to control Nylos, threatening their ability to choose who can harness their power. With the Nylos' freedom at stake, Ava knows she needs help to protect their way of life... but who can she trust to help her?