You just inherited a one-man star freighter - the SunDog - from an uncle who died under mysterious circumstances. You also inherited the contract he signed to aid in the building of a colony for a religious group. You have three tasks to perform: find the location of the colony; find, buy, and deliver goods needed for its construction; and locate the cryogenically-frozen colonists needed to populate the colony.

In order to accomplish your task, you have to explore different planets and it's cities and travel between several solar systems. You trade goods in the hope of making a profit while space pirates and muggers are a constant threat to your efforts to free yourself from a life in slavery in some godforsaken mines somewhere in space.