Three bosom friends, tired of chronic bad luck in love, decide to search for husbands strictly according to science. The author of the idea, a self-confident and daring red-haired beauty, invites everyone to make a list of the external and internal qualities of an ideal man, and then determine the “habitats” of the alleged “victims”. From now on, the girls' slogan is: first calculation, then love! But when real feelings interfere, any theory may turn out to be untenable...