In the medieval city of Bruges, textile historian Dr. Martin Hewell discovers an impossible anomaly: his nine-year-old autistic nephew Thomas appears in a 16th-century tapestry, despite having never visited Belgium. When Thomas mysteriously disappears, Martin realizes the connection isn't coincidental. Museum director Alain Verbeek reveals he's part of an ancient order of "guardians" protecting temporal convergences centered around the Holy Blood relic. The tapestry was created by Dream-Seers who could perceive across time, weaving prophetic images that stabilize the fabric of reality.