Deborah Cochrane and Joanna Meissner, science graduates and close friends, spot a campus newspaper ad that promises to solve their financial problems: an exclusive fertility clinic in Boston is looking for egg donors. Despite rumours of a fellow student donor's unexplained disappearance, the procedures go smoothly.

Deborah is particularly intrigued by the technology involved and by Dr. Spencer Windgate, the charismatic fertility expert. But second thoughts and curiosity about the clinic's secrecy prompt the two women to find out more about the fate of their donated eggs. Working under aliases, Deborah and Joanna soon discover the horrifying aims of Dr. Windgate's research...