After a century-long sleep, a Union soldier wakes up in 1965. Cavalry lieutenant Russell Krause is all at sea in this strange new century of electric lights and automobiles. But he soon acquires a guide: Caleb O'Connor, a kind-hearted, history-loving college student with secrets he's desperate to hide. Caleb is gay, and he's completely smitten with this lively, warm-hearted soldier, who has swiftly become his best friend. Despite changes in social customs, Caleb and Russell's loving friendship grows ever closer. But the cultural divide may prove wider than even love can bridge.