***SPOILERS*** Having just retired from the police at the young age of 40 on a full 100% disability pension Tom Beckwith, James Belushi, who seems to be, from what he goes through in the movie, in the best of health decides to become a psychiatrist to fill in his spear time taking studies at the local collage from psychology professor Lauren Porter, Linda Hamilton, who we soon find out needs to see a psychiatrist herself.
Lauren is suffering from a split personality that resulted 20 years ago when she witnessed her mother being shot to pieces by someone she can't remember and feels that she in fact may have been her mom's murderer! There's also the recent murder on the beach of her friend Jane Weiss, Pat Delany, who may have known who murdered Lauren's mother and was about to go public with it! Beckwith more interest in Lauren then his studies in class takes it upon himself, with Lauren's urging, to find out what makes her tick. That by him following her after classes to find out that Lauren leads a double life as party girl and part time hooker Lena that leads him to be brutally beaten up by her Limey-British-boyfriend Keno Sykes,M.L Chapman, and his friends for sticking his nose where it doesn't belong.
***SPOILERS*** Still trying to get to the bottom of all this Beckwith now fully recovered takes care of business by first tracking down Keno catching him taking a shower and giving him the beating of his life for what he and his boys did to him. It's then on to business in, now as a armature psychiatrist, curing Lauren of her hang ups that have to do with her mom's murder that she somehow feels responsible for. What Beckwith gets is getting Lauren to remember who her mom's real killer was and what he did to screw up her mind in believing that she not he in fact murdered her! No really a big surprise in who really murdered Lauren's mom but a real shock in him showing up just in time, like out of nowhere, to finish off both Lauren and Beckwith, whom he shot, to keep him from being exposed as the killer. Like I said for a man with a 100% disability pension Beckwith had no trouble recovering from a savage beating and then working over one of those who beat him-Keno-so badly to the point where he ended up in traction. Beckwith also was able to recover from a gunshot wound and finish off the person who shot him by tackling him and shoving out of a two story window to his death. As for the now recovered from her guilt feeling Lauren she ended up in a mental asylum to recover from all the trauma, as a both psychology professor and hooker, that she went through in the movie.