Emili Rosell, the young owner of one of Barcelona's top galleries, receives an old manuscript written by an Italian architect about the 'Invisible City' - an ambitious project dreamt up by King Charles III to build an alternative capital city in the Ebro delta. The manuscript tells of a lost masterpiece by the Venetian painter Tiepolo, and the site of the Invisible City is where Emili used to play as a child; drawn in by these factors, he is plunged into a fascinating extinct world. Juxtaposing the eighteenth-century royal court life and the contemporary art world - both with a similar share of intrigue, politics and romance - The Invisible City is a gripping historical mystery and a compelling examination of the forces of power and love.