Becca and her best friend Donovan have an agreement. If both of them are single when they're forty, they will get married. Which is a good thing, because every guy she has dated has been a disappointment.
Donovan has been in love with Becca since they were teenagers. It began when she bought him a get-well-soon card. But he doesn't know how she feels about him. When they agree to marry if both are single when they're forty, he decides to bide his time. This includes chasing off any men that may interfere with his plan.
Everything changes when Donovan's grandfather leaves him an inheritance with one stipulation: He must be married, or he'll lose the estate.
A lot more is at stake when Donovan proposes. He has to convince Becca his feelings for her are real without telling her he's the reason all the other guys bolted.
This finding love after friendship story is the prequel of the Three Creeks sagas where friends find the happily ever after they were looking for was right in front of them.