Point of Return (translated)

While receiving treatment at a hospital, Sienna Lee, who has a personality disorder, learns of her grandma's passing. She decides to rush back to her hometown to lay her grandma to rest before Tomb-Sweeping Day. On the bus home, the strange behavior of the two driver brothers, one with a knife scar, catches Sienna's attention. The bus radio begins to broadcast information about recent criminal gangs, causing the various suspicious groups on board to become mutually distrustful yet interdependent. Along the way, Sienna joins forces with a kind-hearted man sitting next to her to outwit the driver brothers and try to save all the passengers. However, they later learn that a human trafficking ring has been apprehended, and the passengers breathe a sigh of relief. But the real villain is still lurking on the bus, ready to strike. It turns out the dangerous person reported on the radio is the seemingly innocent man sitting right next to Sienna. (translated)