Water, ships, boats and boatmen are part and parcel of Venice. When an Australian couple arrives by yacht at the beginning of their retirement, they are bewildered by a convent's tourist attraction; a mysterious missing map. An empty space in a glass case becomes an ironic mystery they can't ignore. Some time in the shadowy past of this city, the portolan map was created in the mists of doubt and danger. It filled whoever held it with dread;...