Chopin's heart is carried back to Warsaw in secret by his adoring sister. A woman must return to her native Poland in order to poison her terminally ill high school sweetheart, and a young man slowly descends into madness when his wife and child mysteriously vanish during a vacation and just as suddenly reappear. Through these brilliantly imagined characters and stories, interwoven with haunting, playful, and revelatory meditations, Flights explores what it means to be a traveler, a wanderer, a body in motion not only through space but through time.

Amid daily reports of violence, Cushla lives a quiet life with her mother in a small town near Belfast. By day she teaches at a parochial school; at night she fills in at her family’s pub. There she meets Michael Agnew, a barrister who’s made a name for himself defending IRA members. Against her better judgment—Michael is not only Protestant but older and married—Cushla lets herself get drawn in by him and his sophisticated world, and an affair ignites.

Violeta comes into the world on a stormy day in 1920, the first girl in a family with five boisterous sons. From the start, her life is marked by extraordinary events, for the ripples of the Great War are still being felt, even as the Spanish flu arrives on the shores of her South American homeland almost at the moment of her birth.

Gifty is a sixth-year PhD candidate in neuroscience at the Stanford University School of Medicine studying reward-seeking behavior in mice and the neural circuits of depression and addiction. Her brother, Nana, was a gifted high school athlete who died of a heroin overdose after an ankle injury left him hooked on OxyContin. Her suicidal mother is living in her bed. Gifty is determined to discover the scientific basis for the suffering she sees all around her.

A producer at the BBC and mother to a new baby, Tessa is at work in Belfast one day when the news of another raid comes on the air. The IRA may have gone underground in the two decades since the Good Friday Agreement, but they never really went away, and lately bomb threats, security checkpoints, and helicopters floating ominously over the city have become features of everyday life. As the news reporter requests the public's help in locating those responsible for the robbery, security footage reveals Tessa's sister, Marian, pulling a black ski mask over her face.