On meeting Madam Butterfly, Dan feels delighted and tells her that he
will not mind her unfaithful act. However, Madam Butterfly refuses to
join him and says that her days are numbered. She asks him to turn
his love to Caw. Nevertheless, Dan cannot drive her out of his mind
and accompanies her to seek medical help from Chi. Though under
Chi's treatment, Madam Butterfly's health seems to get weaker and
weaker. Feeling hopeless, Madam Butterfly even attempts to commit
suicide but is saved by Chi.
With Lung's help, Yuen's father revives his memory and recovers his
sense. Reunited with his father, Yuen is determined to reform himself
and strive to revive his family name. This delights the Princess
who agrees to marry him.
Lo Tso still wants to get rid of Dan and he makes use of Yu. In the
end, Dan manages to defeat them.