Natasha takes place over the course of one summer. It is the story of Mark Berman, 16, the son of Russian-Jewish immigrants living in the suburbs north of Toronto. When his uncle enters into an arranged marriage with woman from Moscow, the woman arrives in Canada with her fourteen year-old daughter, Natasha. Mark, a slacker, is conscripted by his parents to take responsibility for the strange girl. He learns that, in Moscow, she’d led a troubled and promiscuous life. A secret and forbidden romance begins between the two of them that has bizarre and tragic consequences for everyone involved.

David Wozniak is a perpetual adolescent who discovers that, as a sperm donor, he has fathered 533 children. He is advised that more than 100 of his offspring are trying to force the fertility clinic to reveal the true identity of "Starbuck," the pseudonym he used when donating his sperm. To make matters worse, his girlfriend Valérie is pregnant with his child, but doesn't feel that he is mature enough to be a father.