At his research clinic in Boston, renowned specialist Jake Foster uncovers the terrifying secret behind the city's rapidly rising infertility rate. Meanwhile in a nearby ER, his wife, Dr. Brett Foster, unsuccessfully tries to save a young man with no visible injuries from bleeding to death -- the fifth such fatality in a week. Working together to find answers, Jake and Brett discover that the two epidemics stem from the same diabolical source. And now they will risk everything to expose a sinister plot that could claim thousands of lives ... starting with their own.