The story:
(See also S108 The Heirs)

After the conclusion of the lost commissioner's badge case (see D139 Jungle City), the Phantom is about to return to the Deep Woods when Diana has a big announcement to make that will transform the lives of the newly weds and also the comic's entire narrative: the next successor to the Skull Throne is on his/her way.

As an elated father-to-be returns to Bangalla, Diana starts preparing for a long maternity leave and natural childbirth in the Skull Cave. It is not long before she arrives at the Phantom-Head expecting to be met by her husband, but instead she faces serious danger...