Cassie Policarpio never expected her quiet life in the city to change so drastically. When she inherits an old lighthouse perched on the windswept cliffs of a small coastal town, she anticipates solitude and restoration. What she doesn't expect are the hidden letters she discovers within the lighthouse walls-letters written decades ago to someone named Cassie.

The letters are tender, longing, and heartbreakingly intimate. They speak of promises, of devotion, and of a love so enduring that it seems impossible to belong to the past. Intrigued and unsettled, Cassie begins to unravel the mystery of the lighthouse keeper who penned them-and finds herself drawn to JM Pastor, a local historian with secrets of his own, whose presence awakens emotions Cassie thought she had long buried.

As the lines between past and present blur, Cassie realizes that the love she's uncovering might not only change her understanding of history-it might change her life forever.