PC Bradley has been sent to investigate a break-in when he witnesses an explosion. It is the car of ambulance driver Frank Metcalfe which exploded when he turned on the ignition, and it looks like attempted murder because he has received anonymous phone calls and a threatening letter a couple of days earlier. The grocer Mr. Dale is attacked under similar circumstances. But they have nothing in common. The only lead is a blue Ford Transit van seen on both occasions and that the attacker has military training and access to the local arsenal. Pete Atkins fits these requirements, but he claims his innocence. Oscar Blaketon also receives anonymous phone calls. Is he the next victim? Rev. Meeks represents a foundation which offers Lord Ashfordly to finance the renovation St. Judes Church on his lands, and his lordship hires Vernon Scripps and David to do work for him. Meeks especially asks them to be on the lookout for a particular baptismal font from the church.