After 2 unsuccessful attempts to solve a problem on planet Drogan the 'Visitants' decided that they would have to call in Helen James, their 'Good' from Earth. Her first task was to find out why the planet's beings were dieing and once this was discovered she had to stop it. The nearby planet of Flym was stealing their Oxigen Helen found out how and why and then set about putting it right before both planets were destroyed.