Oh Laura, a renowned scientist, was forced to part with her young son, Nam Shin to cope with her loss. Over the years, she builds various AI robots modelled after him naming them Nam Shin I, II and III. Decades later, after surviving an attempt on his life. Nam Shin slips into a coma to protect his position as the heir to a chaebol. Laura Senos Nam Shin III to take his place and fulfil his outies.
Kang So Bong was a member of Nam Shin's security detail until she was disgracefully dismissed. She becomes Nam Shin III's bodyguard, determined to get to the bottom of his strange comments and behaviour. However, she gets more than what she's bargained for when she starts falling for him and has to keep him safe from the very people who'd tried to murder Nam Shin.
Siu Wai-ming (Joel Chan) becomes a security guard at Twilight Mansion, a run-down place where dodgy characters roam around. He encounters an occupant by the name of Alex (Selena Lee), who is an air hostess and a dead ringer for some qipao clad woman that keeps clinging to him in his dreams. Siu gets closer to Alex and finds out they are somehow interrelated. Meanwhile, strange things keep happening at Twilight Mansion as life experiences and curious stories of other occupants take center stage. Siu shockingly finds out Alex is a mirage! Welcome to the 1960s and Coco (Selena Lee) is a hostess at Twilight Ballroom. She dreams of becoming an air hostess someday. She falls in love with Lau Yuk-fai (Joel Chan), who is a policeman and a dead ringer for some guy in her dream. Her fantastic dream is even adapted as a novel by bookstore owner Lam Yeuk-sze (Bob Cheung). Siu accidentally finds this novel from yesteryear as he just has to get to the bottom of the mystery. Siu is aghast when he finds out he and Alex had been destined to get intertwined in some previous life.