When an ugly creature, who loves eating cats, crash-lands into the Tanner family's garage, they treat him as a guest and allow him to live with them as he comments on the stupidity of mankind.
After the ended of Duckman: Private Dick/Family Man (1994), Duckman has left his family to become a rich playboy. While enjoying his new lifestyle, he learns that he's been replaced by a new "improved" duck. Duckman refuses to let this go and decides to investigate who this impostor is while also trying to reconnect with his own estranged family. Things quickly go to Hell, literally.