You will start in the Undersea City. Go north talk to Dr. Lester, then to Regine and then to Mrs. Lester. Go north, west, north, north, northeast and go down the path until you run into Herve and Cecilia. Then go back up the path to talk to Dr. Lester and Mrs. Lester. You will automatically go to the Lester home; talk to Mrs. Lester.