Lieutenant Tul and Dr. Cherran investigate a murder case similar to an unsolved one from 18 years ago. During their search, they find a body in a suitcase floating in a river, further complicating the mystery.
After discovering the stepfather killed Ploypapat, Tul and Cherran note similarities with an 18-year-old case. The killer may be nearby. Teams unite to investigate. A mysterious candy box arrives at Big Tech at midnight.
A severed fingertip in a box sent to Big Tech leads to discovering a girl murdered like another case 18 years ago, where a finger was also taken. Ran seeks answers from Wisut about her mother.
