The story, without the spoilers.
A walkie-talkie connects a profiler in the present with a detective in the past, and together they can change the outcome of cases that went cold years ago. That was the premise that made Signal one of the most loved crime dramas ever made, and ten years later the story continues. Park Hae-young, the profiler who learned to listen across time, returns alongside detective Cha Soo-hyun, while Lee Jae-han, the detective speaking from the past, is back at the other end of the radio. The new season picks up the unfinished cases and unanswered questions the first season left behind, with the same rule at its heart: every answer from the past changes something in the present, and not always for the better. Written by Kim Eun-hee and directed by Ahn Tae-jin, The Second Signal airs Mondays and Tuesdays on tvN, with episodes one and two shown back-to-back on the first night. If you loved the original, this is the sequel you have been waiting a decade for.
A little curiosity. A new favourite.
Start with the story, meet the cast, and make room for one more episode.