After Lilly suffers a loss, a combative Starling takes nest beside her quiet home. The feisty bird taunts and attacks the grief-stricken Lilly. On her journey to expel the Starling, she rediscovers her will to live and capacity for love.

A married couple suffers a hardship, leading Jack to head off to deal with his grief while Lilly remains in the "real" world, dealing with her own guilt. As if Lilly's troubles weren't bad enough, a starling that has nested in her backyard begins to harass and attack her and she becomes comically obsessed with killing it. Lilly eventually finds guidance from Larry, a quirky psychologist-turned-veterinarian with a troubled past of his own. The two form a unique and unlikely friendship as they each help the other to explore, acknowledge and confront their problems.