There's trouble on ARK TWO, the ecological research station attached to New America. Tom rockets off to investigate, but is nearly killed when a mysterious ship suddenly attacks.

Meanwhile, an important component of ARK TWO, Sea Globe, is stolen. Tom and his friends must search through deep space to find it, but are pursued and threatened by their elusive enemies. Could Tom's buddy, K'orlii, from the planet Aquilla, and his people be the culprits? Tom tirelessly pieces together clue after clue to discover the astounding solution to this baffling space-age puzzle!