Vashti is a pathogenic diplomat—an ambassador to the world of viruses, whom she communicates with through a machine that can translate their chemical signals into images, tastes, smells, sounds, and memories. She begins a negotiation between the US Government and a diplomatic contingent from Arenavirus, a virus which has just begun spreading a deadly mutation in Florida. If Vashti is successful, she and Arena will reach a diplomatic agreement; if not, the Arenavirus infection will continue to spread, and humans will have to race to try to find a vaccine or treatment. As she navigates the diplomatic discussions, Vashti is also trying to connect with her daughter Alma, who lives on the other side of the country in a technology-averse commune. By the time the negotiation ends, Vashti discovers that Arenavirus have learned some impressive and deadly tricks from their interactions with humans.
For over 35 years, the Wild Cards universe has been entertaining readers with stories of superpowered people in an alternate history. In Emma Newman's "Hearts of Stone", a young woman learns how to control her deadly powers from an unlikely ally.