Amateur football team The Trojans are about to face their toughest challenge yet - a charity match with Arsenal in front of a capacity crowd at Highbury Stadium. During the match, the Trojan's star player - John Doyce (Anthony Bushell) - collapses and is pulled onto the sidelines. He is dead and it transpires that he has been poisoned. A recent addition to the Trojans, Doyce's abrasive attitude gained him few friends, so there is both motive and suspects in abundance. Scotland Yard sends in the eccentric Inspector Slade (Leslie Banks) to get to the bottom of things and catch the culprit - and he has just three days to do it before it interferes with his theatre performance!