“We broke time once. It never stopped looking for us.”

 Plot: In present‑day Seoul, Haesu (IU) curates a Goryeo exhibit when a sealed royal letter—addressed to her modern name—appears inside a 10th‑century reliquary. Its ink moves like tide, written by Gwangjong (Lee Joon‑gi) across a thousand years. As a blood moon nears, a time‑scar reopens, pulling Haesu into an echo between eras while palace factions in Goryeo hunt the king’s “moon witch” to end his reign.

Trailer flashes: eclipse light flooding a museum hall into a lotus pond; a portrait’s tear drying in reverse; Haesu stepping through rain that becomes falling petals; Gwangjong unsheathing a blade in a corridor of lanterns; a jade hairpin spinning across centuries; a masked archer loosing from palace eaves; hands almost touching across a mirror—then the glass ripples like water. The price of crossing returns: one memory fades for every truth they keep, and only one heart can stay.

 Verdict: Lush, aching, and myth‑bright—sweeping sageuk grandeur threaded with modern melancholy. If the reunion delivers the closure fans have carried for years, prepare to be beautifully wrecked.