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Twelve Letters makes every episode count, and right now it's all streaming on Rakuten Viki. One of the essential procedurals. Full stop.
In a small town, twelve mysterious letters and a 35-year wait intertwine to shape the lives and loves of a close-knit group of friends. Yu Nian and Shen Cheng’s world is thrown into turmoil when their parents vanish, followed by cryptic messages arriving from another time. Driven to uncover the truth, they plunge into a complex puzzle, navigating dual timelines and unraveling the secrets hidden within the letters that could explain their disappearance. Zhou Yiran and Wang Yinglu lead a cast that brings real weight to the material. It aired in 2025.
Crime and mystery fans will find exactly what they're after here — if To Heart 2 is in your watch history, Twelve Letters belongs there too. It works equally well as a long binge or episode-by-episode over a few weeks.
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