There are many mysteries to be discovered in the neurological research of Professor Christian Wellsley, head of neurological studies at Davrow University outside of Los Angeles. Apparently Dr. Wellsley is conducting hands-on experiments to prove the superiority of men over women by leading a secret life that includes attacking his female paramours.

While the mild-mannered Dr. Wellsely leads a blissful existence with Olivia, his wife of fifteen years and their little, six-month-old baby, he has led a much different life as "Phillip" and then as "John" with the two women who catch on to his antics. First, Olivia survived a brutal attack, then proceeds to warn his next victim, the interior designer Melissa.

Melissa and "John" begin a romantic relationship when he hires her to design a new home he has purchased in L.A. But Melissa's soul mate and co-worker Travis feels that something is "off" with John. It is also not a good sign that Melissa knows absolutely nothing about John's past and has met none of his friends. Slowly, Melissa senses that Travis is right, and she joins forces with Olivia, who proclaims that "we're going to figure it out."

A weakness in the screenplay was the revelation that John is a psychopathic killer only a quarter of the way into the film. The gig is up for the audience when he is recognized by a friend name Henry while John and Melissa are out for a jog. In a subsequent scene, Henry is garroted while getting into his vehicle. It was also never very convincing that Melissa truly felt a romantic connection for John.

Never have the police been more incompetent in a Lifetime film than in "Her Boyfriend's Secret." They are hopeless in their investigation of Olivia's mugging. Then, they fail to check John's arm after it was apparently broken by Melissa after he attacked her in her home.

Once Travis is nearly killed by John and is sleeping through a coma in the hospital, Olivia is murdered by John. It is now entirely on the broad shoulders of Melissa to find the means to set things straight with Dr. Wellsley and assist him in completing the final chapter of his book.

This Lifetime thriller is fun but highly unrealistic. The "single female" lead has a straight and gorgeous single male best friend, and yet she's instead pining over a suspicious guy who isn't nearly as handsome (though he's still good looking) as the male best friend in the film. Seems implausible especially when you see how much chemistry her and the sexy male best friend have together over the suspicious guy. That problem aside, the movie was fun and had great production values and a nice looking cast. A decent quarantine film to take your mind off the world's current issues.

Getting sick of unnecessary & sheer stupidity in movies. I only got so far in this movie because as soon as John's ex showed to HIS HOUSE, ALONE, claiming that he is a psycho who tried to kill her and left her, presuming she was dead. She goes to his place looking for him, not sure why, but....yeah right. How stupid would you have to be??