Brilliant aerospace scientist Iris Harris lost her parents as a child and was adopted by Nathan Ashford, a man she would one day fall deeply in love with. But terrified of the rumors surrounding their relationship, Nathan brings in Serena to pose as his fiancée, deliberately pushing Iris away.
Heartbroken by his rejection and crushed by one misunderstanding after another, Iris makes a life-changing decision: she joins Horizon 869, a deep-space mission so dangerous it may be a one-way trip into the unknown.
By the time Nathan realizes he truly loves her, her spacecraft has already vanished into the stars.
Consumed by regret, he sacrifices his fortune and health, spending the next twenty years waiting at a monitoring station for a signal that may never come.
After twenty years apart, a reunion seems within reach—but will fate finally bring them together, or will the vastness of space and the cruel hand of destiny tear them apart forever?
