After a bruising divorce, headstrong Juliet Miller invests in a flat and advertises for a flatmate, little believing that in her mid-thirties she'll find anyone suitable. But along comes self-employed copywriter Floz, raw from her own relationship split, and the two woman hit it off. When Juliet's twin brother Guy meets Floz, he is overcome with a massive crush. But being a shy, gentle giant, he communicates so clumsily with her as to give her the opposite impression.
Guy's best friend Steve has always had a secret, unrequited crush on Juliet. After a night of too much wine, Steve and Juliet end up in bed, after moaning about the lack of sex in their lives. Convinced that Juliet doesn't feel the same way, Steve agrees to a 'just-sex' relationship, until they can both hook their dream partners. Just when Guy has finally plucked up the courage to tell Floz how he feels, he finds she has rekindled an old romance. Floz has never had much love in her life and is obviously thirsty for affection. She loves the whole Miller family, from Juliet and Guy's warm, loving parents, to their ancient one-eyed black cat. But can Guy turn Floz's affection for his family into something more - into love for him?
Then Juliet makes a series of discoveries which will turn the lives of all four friends upside-down and turns that Autumn into a season where love can be harvested.