When Peter Passenger's parents die, he becomes a man on a mission: a mission to find their killer, and a mission to find answers to those things his family has researched his entire life. But what secrets did his parents leave behind?

When the Mothman suddenly appears, Peter knows he must pursue him. Leaving everything important to him, Peter chases the Mothman and soon finds that a warning is not the only thing the Mothman wants to give him.

As Peter is confronted by demands of the legacy left by his parents, his love for a man who asks him to be someone else, and the seductive moves of the Mothman, he finds he must wrestle against his own desires and drives in ways he never thought he would.