The Christmas Oratorio begins in the 1930s, when Solveig Nordensson (wife of Aron and mother of Sidner) is accidentally killed. The grieving family abandons its home and moves to another town, hoping to start afresh, but finds that its emotional burdens have emigrated with it. Aron, bereft by the loss of his wife, starts "seeing" her in capricious hallucinations, and tragically seeks her reincarnation in a love-starved woman half a world away.

The introverted Sidner begins a quest for emotional maturity that leads him into odd friendships with a remarkably self-reliant street boy and a free-spirited older woman. And grandson Victor, heir to the tortured legacy left by Solveig's death, finds redemption for himself in a staging of Bach's Christmas Oratorio - a performance begun by Solveig half a century earlier and interrupted by her tragic death.