Season 1 of Petrichor premiered on November 23, 2024.

The first field deployment of Lieutenant Tul, a rookie officer assigned to the Criminal Investigation Department, unexpectedly brings her face-to-face with Dr. Cherran, a physician from the Institute of Forensic Sciences. Their differing work attitudes create a considerable gap between them, making it challenging to find common ground.

Amidst the crime scenes reflecting societal issues, Detective Tul also contends with pressures from a working system favouring influential groups. She navigates the interference aimed at protecting allies and the societal currents that could influence the case's outcome.