Made in Abyss (2018)

As Cai's brother disappears in the forest where people seemingly vanish, his mate begs him to stop and let things rest. After Cai vanishes mysteriously alongside his brother, Ben is investigated by police who suspect him of playing a part in the disappearances. Ben decides to take matters into his own hands and begins to uncover the mystery himself, but apparitions haunt him; making Ben believe he is being followed by something sinister.