On trial for eating her tenth baby, Isabella Rossellini pleads that if she were a hamster, this would be considered natural. Rossellini takes a close look at the infanticidal maternal instincts of the hamster.

Sentimentality, be damned: the killer females of this rodent order are merciless when it comes to newborns. Slipping out of prison uniform and into a furry onesie, our informative host discerns the strengths and shortcomings of a new litter with pragmatism—and an appetite for whichever is the runt.