After he is fired from his position as a field epidemiologist for the CDC, Yuuri Katsuki takes a position in Paris, working with world-famous epidemiologist Viktor Nikiforov. Fairly quickly, Yuuri realizes that Viktor is the man of his dreams: he’s intelligent, driven, and beautiful. Even though the attraction seems to be mutual, Yuuri knows it’s a bad idea to sleep with his boss. However, when an accident exposes Yuuri to an unknown virus, he's left wondering: will he get his happily ever after?