Sooriya Sulanga follows Sidath, a Colombo bank executive whose peaceful life falls apart after he shelters a sick young woman named Radha on the eve of his wedding. When Radha becomes a suspect in a violent bombing, Sidath is arrested, loses his job, and watches the people closest to him turn away. Branded a criminal he never wanted to be, he's forced to fight to clear his name while digging into the real story behind the attack. It's a tense, fast-moving thriller about how quickly an ordinary life can unravel.