The series tells the story of the hunt for a serial hugger who always attacks his victims with acid. The chief investigating officer, Detective Chief Inspector Gabriel Markham, himself becomes a victim of the perpetrator but survives the attack. The story is shown in reverse, starting with the police shooting the suspected hugger and then moving backwards in sections to finish at the beginning of the story. The period of time the story has moved backwards is shown each time on the screen.
Rellik Ended after Season 1
BBC One aired the final episode on Monday 16th October 2017