For as long as Bridget Northcott can remember, she has loved her brother's closest friend, Colin Foster. She loved him long before he grew up, became Captain Foster, and long before he left her behind for a life at sea. Although she knows her feelings will never be returned, Bridget cannot help but turn away every suitor in the hopes that one day Colin will come back to Larkhall and see her for what she has grown up to be—refined, elegant, and the precise opposite of the silly girl he once knew.

When family circumstances bring Colin's unexpected return, he too has changed. Once carefree, he is now cold, hard, and distant. Determined to unravel the mysteries of Captain Foster, Bridget writes her thoughts in a note, one she never meant to send. As a hesitant friendship grows between them through their letters, Bridget determines to keep her heart uninvolved. But when her facade begins to break, she realizes the childhood silliness she abandoned might just be precisely what is needed to pull him back to shore.

Faced with a choice between loyalty and selfishness, love and letting go, Bridget must find the strength to confide her own feelings in Captain Foster before the man she loved is lost forever. But there is only so much she can do when she discovers a match between them is what she has always feared—forbidden.