Tritons of Mistvalley River

From publisher blurb: At the end of the fabled Mistvalley River is a aquatic haven of the Tritons. However, upstream, a colossal dam is being built by the fiendish Duke Dellinger, aiming to destroy the homeland that the Tritons have had for generations. Will you take Dellinger up on his offers of countless gold pieces and the progression of the realm of man, or will you aid the ailing Tritons and destroy the dam once and for all? Tritons of Mistvalley River was originally written for a party of Level 6 characters, though is primarily narrative-based and may be adapted to all levels.