Jo's new romance is firing up with her fencing tutor - world class athlete, silver medal winner and sports journalist Guy Merrin and the Heelers are impressed. PJ and Jo are called when a 17 year old athlete named Callum Stiles collapses on the track and dies. Jo finds syringes in his bag. His mother tells them Callum was under a lot of stress over winning the games but she wouldn't have given him drugs, she was once an athlete in a scandal herself. Jonesy suspects a drug called EPO which increases oxygen flow and might not be detected in regular drug tests. Guy soon comes to the station looking for information after he heard a rumour that drugs were involved. Tom and PJ are worried Jo's personal life is getting in the way, but she is also intrigued as to these ""rumours"". Neither Assistant Coach Dan Reed or runner Fiona Bartram believe that Callum was using drugs, and Dan is publicly against them. Callum's world class coach Frank Jarvis is also known to have spoke out against drugs,