The big, bad Germanic woods spits out a wounded orphan in the opening of Rebecca Daly’s Good Favour, whose fairy tale clarity gives way to a woozy, slippery blend of crisp devotional realism and fanatical flights of fancy. The Irish director’s third feature, co-written with Glenn Montgomery, is a subtle, sturdily controlled parable about the power of shared myths, comparable to Robert Eggers’ The Witch if not in genre then in recreational detail and reality-breaking seriousness. Tom (Vincent Romeo) is the malnourished, skinny young man from the Black Forest, who stumbles on small markers of settlement: a hatchback truck, an empty classroom, a cabin…