How difficult it is to become happy! Three ordinary women from San Francisco, strangers to each other, have a lot of reasons to worry, because they always lack something for complete happiness: a beloved guy, a child, money or an apartment. They do not believe in gifts from fate, but life still has surprises in store for them. By a happy coincidence, Liz, Carol and Angela celebrate their birthday on the same day. And each of them makes one single most cherished wish over the birthday cake...