The columns of the Mezquita of Cordoba hide a passage to an unknown dimension that , in 1926 , was visited by the brilliant Dutch engraver M. C. Escher , who was influenced by it throughout his life . These days , a friend of Angie is trapped in the same dimension and Mystere investigates his disappearance . But the path of Martin crosses , with unpredictable outcomes , with those of the gangster boss Don Manzanera.
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