From back cover:
The adventure is explosive...
Volturnus: a barren, hostile world. When a pirate attack stranded your party of adventurers here, your luck and skill, and the help of the Ul-Mor, enabled you to survive.
The Kurabanda, a mysterious tree dwelling race, are your only hope of finding the lost explorers you seek. On this planet of mystery and
danger, survival itself is doubtful. Are you equal to the challenge that lies ahead?
VOLTURNUS, PLANET OF MYSTERY is the second in the Volturnus series of
modules for the STAR FRONTIERS game. It can be played as a separate
adventure or as a continuation of CRASH ON VOLTURNUS, included in
the [STAR FRONTIERS book]. VOLTURNUS, PLANET OF MYSTERY contains maps and referee’s notes, as well as full information on several creatures and intelligent races inhabiting the planet. The Volturnus adventure will be continued in [SF2: STARSPAWN OF VOLTURNUS].