Tilly Fernsby’s happiest memory is the summer spent on the Isle of Mull with best friend Logan Wray and his aunt Joy, exploring the beautiful Scottish island and making plans and promises for their future.

Returning together nearly fifteen years later after Logan inherits his beloved aunt’s house is a bittersweet experience. Overcome with sadness, they both carry regrets and secrets from that summer.

For Tilly it’s a chance to right a wrong and learn to open her heart without the fear of getting hurt. For Logan it’s an opportunity to make good on a promise while being honest about his true feelings.

With the help of Aunt Joy's journal filled with lost love, heartfelt words and sage advice, a new dawn of honest emotions emerges to the breath-taking island backdrop of lochs and mountains.

Will Tilly and Logan endure further heartache, or can a summer promise pave a way to everlasting happiness?