BHP is plotting what seems to be the biggest project in Australian history. Bigger than Snowy, bigger than The Bridge. But why are they so bashful about it?

It has a taskforce code name - "Together Tomorrow". But who is together? What are the politics? We piece together the jigsaw with BHP whistleblower James Joseph and coal miner advocate Simon Turner the stealthy plan to turn the Hunter into lakes in a massive coal-to-renewables and recreation venture.