June 1954. The corpse of the Princeton University assistant librarian is discovered. Before dying, he has been able to write with his blood the greek Epsilon letter. Inpector Michael Rumford is in charge of the case… Has Albert Einstein copied Henri Poincaré’s article about the E-MC2 and the discovery of relativism? Edgar Hoover, FBI’s boss, wants to blackmail the physician to insure he will stop to publicly get opposed to the H-Bomb. Industrial espionage, suspicions of communist friendships, wars between scientists, Michael Rumford has a lot to inquire about.