The team delves into the world of horseracing when a racehorse owner, Robert Banyon, is killed at the track. Video of the race shows Banyon's horse, an odds on favorite to win, slowed up before the finish line, leading the team to suspect the race was fixed. Meanwhile, a member of the Russian mob breaks in to the house of Ryan's friend, who is also the track veterinarian. But before Horatio can get any information from the intruder, he slits his own throat, taking his secrets to the grave. After determining the Russian mob tried to strong arm the veterinarian into doping the horse, Horatio soon suspects Ivan Sarnoff, the Russian mob boss (#704), is behind fixing the race. Not wanting to let Ivan get away with another crime, the team looks for iron clad evidence that ultimately proves Ivan doped the horse and has made millions fixing races.