With the Skymapper in disrepair and the Minister on Siding Spring's doorstep, all looks lost for the team at Siding Spring Observatory.

Down in Tasmania, Harry is on the verge of a huge discovery, but with Mark and Helene seemingly preoccupied, will anyone be there to help.

As the town prepares for the big fancy dress party, Steve struggles with whether or not to betray his friends at Siding Spring.

When speed dating comes to Coonabarabran, Helene decides to attend. Still unable to get her mind off the closure of Siding Springs, an unexpected encounter with her rival leads to a late night confrontation and a surprisingly good night.

A rock legend arrives in town to perform at a benefit organised by Mayor Barnham. The opening of the Red Skies observatory looms whilst Helene's affections continue to grow for interstate colleague Simon Redding.

The Siding Spring Observatory is in danger of being shut down and resident astronomer Helene McKenzie is the only thing standing in the way. Battling an inept local council and hindered by a ragtag bunch of colleagues, her fight is set to be an uphill one.