Barbara Thorson (Madison Wolfe) spends her free time in a little washed-ashore boat that she has transformed into a secret clubhouse. She's the kind of kid a frustrated teacher might call "too smart for her own good." Barbara can intellectualize her grief as a coping mechanism -- she just can't allow herself to feel it. Instead, she busies herself laying down protective talismans and conducting experiments to find which concoctions of whatever's left in the refrigerator to attract the giants to her traps.
The film suggests Guillermo del Toro's Pan's Labyrinth, in the trust the director places in its child character to tell her own story without the adults butting in too much. Wolfe is a talent, simultaneously tough and tender in her performance. The young actor's face flushes red as Barbara grows angry and drains to white when Barbara knows she's been caught in a lie.
Walter is riding a tricky line, but it's his mixing of fantasy and reality, making the edges between the two porous, that ultimately sells the film. We might not need to know whether the giants are real.