Lan - a detective fiction author - couldn't bear the hurt from her husband's betrayal, so she decided to leave the house and move to an rental apartment in an old building with her five years old son, Bi. Around the same time she moved in there, Vu - an amateur musician- also chose an apartment here to live in. Once Lan received a music box by chance from Mrs. Chu, the apartment manager, her family as well as the other tenants kept being tormented by horrible nightmares. Hence, Lan and Vu determined to find out the truth behind the spooky music box and the female spirit in a red dress.