Sam Collins works in the pharmaceutical industry and specializes in vaccines. He arrives in a southern city where he has to meet on duty with a mysterious Dr Alexander. Going to a doctor-sponsored party, he meets a lot of picturesque characters in bed with a beautiful woman named Jessie. Driving on the highway the following morning, Sam is forced to stop urgently when he suffers severe stomach cramps. A policeman takes him to the hospital, and there Sam receives a terrible news: “You were killed, Mr. Collins,” he informed the doctor who took over. “You only have 24 hours of longevity,” he continues. Neither Alexander feels good at all, and later he is found dead by poisoning. Meanwhile, Sam is desperately trying to find out who has poisoned him and find an antidote before he has the same fate.