Thirty-four-year-old Wren Waters believes that if you pay attention, the universe will send you exactly what you need. But her worldview shatters when the universe delivers two life-altering blows she didn’t see coming. No one is more surprised than Wren when she discovers that geocaching is the only thing getting her out of bed and out of her head. She decides that a weeklong solo quest geocaching in Oregon is exactly what she needs to take back control of her life. Enter Marshall Hendricks, a psychologist searching for distraction as he struggles with a life-altering blow of his own. Wren is beyond grateful when Marshall rescues her from a horrifying encounter farther down the trail. What begins as a platonic road trip gradually blossoms into something deeper, and the more Wren learns about Marshall, the more she wants to know.

Layla Hilding is 35 and recently divorced. Struggling to break free from the past --- her glory days as the lead singer in a band and a 10-year marriage to a man who never put her first --- Layla’s newly found independence feels a lot like loneliness. Then there's Josh, the single dad whose daughter attends the elementary school where Layla teaches music. Recently separated, he's still processing the end of his 20-year marriage to his high school sweetheart. He chats with Layla every morning at school and finds himself thinking about her more and more. They decide to be friends with the potential for something more. But when two people are on the rebound, is it heartbreak or happiness that’s a love song away?

Annika Rose is an English major at the University of Illinois. Anxious in social situations, she'd rather be surrounded by the order and discipline of books or the quiet solitude of playing chess. Jonathan Hoffman joined the chess club and lost his first game --- and his heart --- to Annika. He admires her ability to be true to herself and accepts the challenges involved in pursuing a relationship with her. What follows is a tumultuous yet tender love affair that withstands everything except the unforeseen tragedy that forces them apart, shattering their connection and leaving them to navigate their lives alone. Now, a decade later, fate reunites Annika and Jonathan in Chicago.