Animal Ark in America.
A trip to the States is a dream come true for animal-lover Mandy Hope.  She can't wait to meet the animals that live there!
A dolphin dilemma . . .
Mandy's been spending a lot of time at the local dolphinarium, playing with two tame dolphins, Bob and Bing.  The dolphins are happy performing together - but when Bob dies, the lonely Bing pines for company.  Mandy and her friend Joel are worried about his future - until they come up with a daring plan . . .  But will it work?