Inspector Carr at Scotland Yard receives a call asking for assistance from the Kent County Constabulary concerning the apparent murder of race car driver Rick Lester. Having been a racing fan from his younger days, Carr was familiar with the name, Rick Lester. He was one of the brightest of that select galaxy of stars, the Grand Prix drivers and since he had signed a contract with the Turnbull Racing Team, it appeared to be a combination with World Champion written all over it. Inspector Carr and Sergeant Jackson arranged for a car and left at once for the Grand Prix circuit at Brands Hatch. On the way, Carr says "Well, Jackson, it strikes me that this might be a case where some specialized knowledge may be useful. What do you know about motor racing?" Jackson says "Well, I'm not an expert, sir, but since British cars have been showing the foreigners the way around, I certainly followed it rather more closely". Carr says "I suppose they're all at Brands Hatch for the British Grand Prix there". Jackson says "That's on Saturday. Today and tomorrow, they're holding the official practice sessions". As they arrive, Carr says "That must be the Turnbull Pit over there, where the other police cars are parked. They look a bit out of place in these surroundings". As they stop the car, and start walking to the pit area, a man comes up and says "Inspector Carr?" He says "Yes". The man says "Hello, sir, I'm Jones, Kent CID". He says "Well, it all happened about 2:30. They were testing the car and after some thirty laps, Lester came in, got out of the car, and picked up a drink from the pit counter, and that was that". Carr says "Looks as though it was cyanide". Jones says "Cyanide, that's what our doctor said. You can still smell it in the paper cup he used. The official report should be through any minute. We had the body taken down to the mortuary, sir. There was no reason to keep it here". Carr says "Are you sure there isn't a chance of suicide?" Jones says "Well, that can be considered as a vague possibility, but why, sir? There doesn't seem to be any reason".