Sleuth team, Stephen and Emily Travis (Criminal Justice) are back! Emily, an animal scientist, is called to a dairy farm where the cattle are sick and dying from a mystery illness. What begins as a straightforward scientific investigation leads to the discovery of deliberate dumping of toxic waste over hundreds of miles of rural roads—polluting land, water sources and all those who rely upon them. As the sickness spreads, Emily and Stephen find themselves involved in a web of criminal intrigue wherein the person(s) behind the toxic spills will stop at nothing—including murder—to hide their identity.