Elena Johnson, an expert on AIDS vaccine, and Marcus Sullivan, her husband, agree to DINK. Marcus, however, had private contact with an HIV patient named Sophia and attempted to conceive in an illegal way, only to be infected and ruined by Sophia's design. Marcus and Sophia retaliated by intercepting the critical mass production of the vaccine solution, threatening Elena with millions of lives as bargaining chips. Elena ultimately chose to defend the vaccine and mission.
