After her husband is killed in a mysterious accident, a widow is haunted by images of things she has never seen or experienced.

In Hong Kong, Dr. Gao Jing is introduced to the brother of her best girlfriend Chen Xiao Kai, the photographer and diver Dave Chen Guo Dong. They fall in love with each other and Guo Dong invites Gao Jing to travel to Taiwan to visit an ancient submarine city, where he intends to propose her. During the dive, Guo Dong vanishes. Gao Jing cannot recall what happened underwater. She decides to investigate.—Claudio Carvalho, Rio de Janeiro, Brazil