Scrub mussels under cold running water. Heat wine in a large pot. Add mussels. Cover pot and steam for about 5 minutes, or until mussels are opened.
Strain cooking liquid through cheese cloth. Save. Remove mussels from shells. Reserve for garnish.
In a medium saucepan, add mussel broth, shallots, onion, saffron, parsley and chicken broth. Simmer for 10 minutes. Combine butter and flour to a paste.
Whip in the cooking liquid to thicken. Add cream and seasoning. Add mussels.
Saute scallops in butter and lemon juice until transparent. Dice the scallops and cooking liquid to soup together with mussels.
Heat soup and serve hot.