Alex, a quiet and introverted college student in Glasgow, lives a simple and lonely life, keeping mostly to himself. His days are filled with lectures, and his nights are spent scrolling endlessly on his phone, trying to escape the silence around him. He doesn’t expect anything new or exciting to happen—until one night, he receives a message from an unknown number asking, “Hi… do I know you?” What seems like a simple mistake slowly turns into something much more mysterious. The girl on the other side, who calls herself Sara, refuses to reveal her true identity, yet she understands Alex in a way no one else ever has. As their conversations grow deeper, so does their emotional connection. But just when everything begins to feel real, Sara sends a chilling message—“I don’t have much time”—and suddenly disappears without a trace, leaving Alex with questions he cannot answer.