Widower Mike Swift is coping with bringing up his little son Peter and teen-aged daughter Anne,who is still dealing with the loss of her mother. One night Mike meets the much younger Deborah,who reawakens his interest in dancing the tango,as well as becoming a confidante and friend to Anne. However it becomes apparent to Anne that Deborah's meeting with her father was no mere accident and that she has an ulterior motive for being with him beyond winning the tango contest. When Anne starts to pry in Deborah's room she uncovers a frightening secret about her and about Mike too.