“Is this a dream?” Alma (Rosa Salazar) asks her father, Jacob (Bob Odenkirk), in the second episode of “Undone.”

“No,” he says. “Well, partly.”

It’s a reasonable question, and the answer makes more sense than you might assume. For starters, there is the little fact that Jacob is dead, killed one Halloween night years ago when Alma was a girl. Nonetheless, she’s been seeing and talking to him, ever since a car accident left her with a, shall we say, altered view of reality and time. Today becomes the past becomes her childhood becomes the future.

Her father’s description of her situation also describes the feel of the transfixing and lushly beautiful “Undone,” which comes to Amazon Prime Friday . It’s reality and it’s not reality, a grounded, naturalistic story that now and then slips its tether like a helium balloon and drifts into a half-dream state.

“Undone” creates this hypnagogic feeling as much through its appearance as through its story. As directed by Hisko Hulsing (“Kurt Cobain: Montage of Heck”), it’s animated using rotoscoping, in which artists trace images on top of live-action footage (an effect used in films like Richard Linklater’s “A Scanner Darkly,” whose animation team contributes to “Undone”).