Deep in the Wood (2015)

When young Tommi goes missing during a festival in the Dolomites in 2010, his parents are devastated. Five years later, a boy is found with no name or records; DNA tests prove it is Tommi. But while Tommi's father Manuel welcomes him back with open arms, his mother Linda is not convinced that it is her son. Suspicion and superstition permeate the pores of this eerie mystery thriller.

Unfortunately the movie Deep in the Wood is not yet available on HBO Max.