Watched all 13 episodes of Thailand's 2019 Sleepless Society: Nyctophobia. A woman loses her young son, Arm, and develops a phobia for the night and for sleeping. Soon a strange boy comes to the house and claims that he is Arm in another boy's body.

This is a suspenseful movie, and is distinctly Thai in that the viewers cannot predict how it will all end. There are several unexpected but credible plot twists, and every episode is engrossing. Episode 8 onward is an exciting detective story. It ends wonderfully, though, and the ending is most satisfying.

There are, unfortunately, some technical glitches. To begin with, why does Karn immediately dismiss Sita's cult as fake when he was born and raised in mystic Thailand? For a rich cult leader Sita has an extremely limited wardrobe and jewelry as compared with the other characters. In Episode 4 Arm creates a deep cut in his palm with a kitchen knife and Meena bandages it, but in the scenes that ensue the bandage and the cut are no longer there. In Episode 8 Meena is wearing black yet is inappropriately wearing jewelry at Waan's funeral wake. In Episode 9 Meena visits Plenwarn in hospital. She is clutching a handkerchief in her right hand. In a succeeding close-up she brings up both hands to her face and the handkerchief is absent. Then, in the medium shot that follows, the handkerchief is in her right hand again. 

At any rate this was a most enjoyable movie.

Quite interesting that the Thai "hup" means "yes" and is also equivalent to the Tagalog "po", which my Thai friend Joseph confirmed.