Dark (2017)

Storyline:

When two children go missing in a small German town, its sinful past is exposed along with the double lives and fractured relationships that exist among four families as they search for the kids. The mystery-drama series introduces an intricate puzzle filled with twists that includes a web of curious characters, all of whom have a connection to the town's troubled history -- whether they know it or not. The story includes supernatural elements that tie back to the same town in 1986.