The story:
With the twins' birthday approaching, the Phantom and Diana are busily preparing presents for their two jungle kids, and this year the little ones are getting something special: a Phantom costume and a pony each.

Properly attired, the twins start practising pony-riding in a corral near the tree house until they are deemed skilled enough to go on a supervised ride in the jungle with Diana and Devil. But the idyll is shattered when two thugs barge in on the group...