What are endangered species, " asked Biju the baby elephant, "will we like them?" "Well, some, for sure, " answered the zoo director, "because you are one. In many parts of the world, elephants are no longer safe in their jungle homes. So it's important for people who love animals to look after them." Biju, visiting his friend Daniel in Vienna, stays at the brand new zoo for endangered species, close to Dan's home. As they explore Vienna, adventures are sure to happen.