In charge of protecting the president of a mafia-infiltrated union in New York, John Blacksad will conduct an investigation that will prove particularly delicate and rich in surprises. The daily life of the workers in charge of the construction of the subway in the inner parts of the city, the underworld and the middle of the theatre, an absolute contrast between the shadow and the light, the world from below and the world from above embodied by the ambitious Solomon, master builder of New York.