Another Man's Poisson

Vic Fontainee, a blind fish monger, hires Mike to find out if the man claiming to be his long-lost brother is really on the level. Mike discovers that not only is the man an impostor trying to falsely inherit $20,000 from the Fontanee family trust, but the fraud is also having an affair with his wife, Maria. What Mike doesn't discover, until it's too late, is Maria's plan to kill her husband.