My name, Gregg Haljan. My age, twenty-five years. My occupation, at the time my narrative begins, in 2075, was third officer of the Interplanetary Space-ship Planetara.

Thus I introduce myself to you. For this is a continuation of the book of Gregg Haljan, and of necessity I am the chief actor therein. I shall recapitulate very briefly what has happened so far:

Unscrupulous Martian brigands were scheming for Johnny Grantline’s secret radium-ore treasure, dug out of the Moon and waiting there to be picked up by the Planetara on her return trip from Mars.

The Planetara left, bound for Mars, some ten days away. Suspicious interplanetary passengers were aboard: Miko and Moa, a brother and a sister of Mars; Sir Arthur Coniston, a mysterious Englishman; Ob Hahn, a Venus mystic. And small, effeminate George Prince and his sister, Anita. Love, I think, was born instantly between Anita and me. I found all too soon that Miko, the sinister giant from Mars, also desired her.