The Long Forgotten - David Whitehouse

When the black box flight recorder of a plane that went missing 30 years ago is found at the bottom of the sea, a young man named Dove begins to remember a past that isn't his. The memories belong to a rare flower hunter in 1980s New York, whose search led him around the world and ended in tragedy. Restless and lonely in present-day London, Dove is quickly consumed by the memories, which might just hold the key to the mystery of his own identity and what happened to the passengers on that doomed flight, The Long Forgotten.