As he cared for his dying parents, Ian Tuason wrote horror film ‘Undertone’

Six years ago, when filmmaker Ian Tuason‘s parents were both diagnosed with terminal cancer, the writer-director moved back into the suburban Toronto home where he’d been raised to be their caregiver.

His mother died quickly, his father two years later. It was a time of trauma and grief but throughout it all Tuason worked, writing a screenplay for “Undertone,” the new A24 horror film that which arrives in theaters on Friday, March 13.

“When I was caregiving, I was really stressed...