Halla is an independent woman in her late 40's. But behind the scenes of her quiet routine, she leads a double life as a passionate environmental activist. Known to others only by her alias “The Woman of the Mountain,” Halla secretly wages a one-woman-war on the aluminium industry trying to expand its reach in Iceland.
As Halla's actions grow bolder, from petty vandalism to outright industrial sabotage, she succeeds in pausing the negotiations between the Icelandic government and the Chinese corporation trying to install a new aluminium smelter. But as she begins to plan her biggest and boldest operation yet, she receives an unexpected letter that changes everything. Her application to adopt a child has finally been accepted and there is a little girl waiting for her in Ukraine.
As Halla prepares to abandon her role as saboteur and saviour of the Highlands to become a mother, she plots one final attack she hopes will deal the aluminium industry a crippling blow.