but when mischele lewis met liam allen, he checked all the boxes. he was charming, smart, and something of a jet-setter. mischele welcomed him into her heart only to realize her new boyfriend was leading a double life. who was the real liam allen? it was a riddle this single mom was determined to solve. here's dennis murphy with "the mystery man." ♪♪ >> reporter: what's love got do with it? well, as mischele lewis tells it, just about everything. love, her new guy at long last made her tingle as though ginger ale had filled her heart. >> i felt good about myself. he was a wonderful person. >> reporter: but why, oh why, should something so good and rare lead to such a dark place? a shadowy world where nothing was as it seemed. where secrets became goggles blinding the truth. >> this is so intricate and dark. >> reporter: as she was pulled deeper into the riptide of her fiance's hidden underworld, she joined forces with a woman an ocean away to uncover the truth. >> he has intruded on every part of your body, of your mind. >> reporter: would mischele b