Mae "Don't Knock Twice" yn stori emosiynol sy'n llawn tyndra a throeon, am fam llawn euogrwydd sydd am ailgysylltu â'i merch y cafodd ei gorfodi i'w rhoi mewn gofal. Er mwyn arbed ei merch ddiarth, mae rhaid iddi ddadorchuddio'r gwir dychrynllyd y tu ôl i'r chwedl am wrach ddialgar a demonaidd.
“Don’t Knock Twice,” an emotional story, full of suspense and twists, is about a guilt ridden mother who wants to reconnect with the daughter she was forced to place into care. To save her estranged daughter, she has to uncover the terrifying truth behind the urban legend of a vengeful, demonic witch.