Mirabelle is the "shopgirl" of the title, a young woman, beautiful in a wallflowerish kind of way, who works behind the glove counter at Neiman Marcus "selling things that nobody buys anymore . . ."

Mirabelle captures the attention of Ray Porter, a wealthy businessman almost twice her age. As they tentatively embark on a relationship, they both struggle to decipher the language of love -- with consequences that are both comic and heartbreaking.