Thora, August, and Hugo come from different worlds – one an art school dreamer, one a wealthy scion of the old elite, and one an ordinary boy from out of town. But over the course of two sky-blue summers in Stockholm, they are drawn together magnetically. The novel opens years later, when Hugo, long estranged from Thora and August, is visited by their daughter – who has questions about her parents which she believes Hugo can answer – and the memories of those luminous days come flooding back.