The Successor.

Family patriarch Phanu wants his mall to be on top and his children will have to make it happen. Eldest son Nathee and his wife Wirin believe the younger generation, coming in with fresh ideas, should lead the business. When Nathee and his eldest son die in a tragic helicopter crash, Wirin is heartbroken. Soon, however, she's shocked to be accused of their murder and her second son, a monk named Talayluang, is forced to leave the monkhood to help her. A battle between Talayluang and Mahasamut, another of Phanu's grandsons, is about to begin.