A couple traveling through northwest Scotland, whose strained relationship is further tested by news of an unexpected pregnancy. They encounter a reclusive man named Hagan, who offers to sell them a pane of "slow glass"—a remarkable material through which light takes years to pass. This allows viewers to witness scenes from the past as if they were happening in real-time. As the couple contemplates the purchase, they uncover a poignant truth about Hagan’s past and the haunting memories preserved within the glass.YouTube+1