Maurice is on medication and seems in a better place, Deborah's "misery memoir" about him is about to be published, Shun is drinking the summer away, Donald's set up a business and Amy's band is coming to stay.
Amy continues to rehearse her band the Pink Cuttlefish Orchestra for their performance in Omsk but is increasingly troubled by images from the book Baumgaertner and asks Maurice if he can shed any light on it, though he is unable to. Amy is also hostile to Deborah's making money by exposing her husband's illness, refusing to read her work whilst Maurice is perturbed by Shun's drunken public outbursts and Donald declares his hatred of all women.
Consumed by the fate of her grandfather and the intoxicating world of Baumgaertner, Amy seems to exist in a world of her own. Maurice and Deborah's relationship deteriorates and Shun is caught between the warring couple.
Hylda confronts Deborah about Amy's increasingly odd behaviour. A drunken Maurice throws a wild party with the Pink Cuttlefish Orchestra. Amy discovers the truth about her grandfather and the origins of the Baumgaertner book.
As the dust settles from recent events the family find themselves back together at the house. Deborah and Maurice slip back into their paternal roles, for the good of the children. Donald realises that his sister may also be mentally ill.
The unconventional dark comedy ends by breaking with traditional narrative form, stepping away from the present to remember Shun's arrival at a happier time and giving the characters the freedom to decide their own fate.