Cosmo remembers a time when dodos lived happily on Earth. But with humans came their guns, and soon the only dodos left were Cosmo and two friends. Then comes the terrible day when Cosmo finds himself all alone, the last of the dodos. If he is to survive, he must leave the planet he loves. He is lucky to make a trusty friend in the form of an almost-human space robot, and, together, they set out across the universe to find other dodos. But soon they realize that many creatures, and even the planet Earth, need protection and care. The survival of all living things depends on it.