Outnumbered and outgunned by the advancing troops Biovoc, so Heartbreakers can not afford genetic studies professor Sorenson to get into the hands of the enemy - even if it requires sacrifice. This shocking conclusion to the second story arc of the series drew astonished letters from readers when first published.

The Director-General Biovoc Vegas Ward, determined to regain control of the latest genetic discoveries Sorenson, sends a command to attack, to raid shelter Heartbreakers "on Ganymede.

Teresa Sorenson and its clones have been hiding on Jupiter's moon Ganymede, for several years, undetected. But a chance meeting at a trading post in the asteroid belt leads to the discovery of a secret base The Heartbreakers.