The Blue Lagoon was a silent success with the audiences of 1980, not to mention one of the most controversial movies of all time. So, I guess the director just wanted to have the same amount of success, so he used the same story, just different characters.
Unlike the way the first one ended, Richard and Emily are dead when they are found, but their son, Patty soon renamed Richard after his father is adopted by the only mother on the ship, Sarah who has another child, a daughter, Lily played by a new successful actress, Milla Jovovich. When the ship takes another tragic turn by getting torn down by sea, Sarah, Richard, and Lily land "coincedentally" on the same island that Richard and Emily lived on. The house has change a bit, but I guess it can't always stay the same, but Sarah raises the children more different than in the first film, Lily and Richard know the ways of nature and let their love blossom after Sarah passes from being ill. When civilized men finally come to save Lily and Richard they begin to question the meaning of what is truly civilized and what is not.
Over all, I wouldn't say it's a bad movie, but it was just an unnecessary sequel. Because of the fact like I said, it's the same plot. Some great actors got their start though because of this film. So over all, I'm not going to give it a terrible rating, but the director could have thought this out a little more.
3/10