In a few hours, the SRU gets several bomb calls, all deadly serious, against 'environmental criminals', notably firms, and finally a university science faculty. Frantic detective work traces them to environmentalists, not John Martens's modern PR-oriented organization but the remnants/heirs of the PLC, once run by the Kaminski couple, now professors. Overstretched on several sites, the team must allow Lew to tackle the campus bomb alone. But it's trapped with a landmine, a virtually hopeless case according to Sam's Afghanistan experience.