Follows a group of Hong Kong forensic scientists working together with the Hong Kong police to solve murders through physical evidence left over from crime scenes.
Bomb disposal expert Ivan Yeung returns from England and happens to come across a grenade case by accident. Ivan's skills are highly appreciated by senior chemist Ko Yin-pok and he is invited to join the Forensic Division. Meanwhile, other members of the team are caught in an explosive incident that ends up changing team dynamics.