Julia Barretto , Charo Santos-Concio, Christopher de Leon, and Tony Labrusca have been set to star in “Knock Three Times,” the upcoming Philippine horror feature from director Jerrold Tarog, CreaZion Studios has revealed ahead of the Cannes Film Market . The film follows a young woman returning from rehab who discovers her mother has fallen under the influence of a malevolent antique mirror. The story draws from Filipino urban folklore, specifically a childhood ritual involving mirrors, candles and three knocks that serves as the narrative’s foundation. Created by Real Florido, the project was first unveiled last year and previously reached the finals of the EST N8 Horror Pitch at the Asia TV Forum & Market in Singapore .…