From Yen Press:

Each year, the Ushiromiya family gathers at the secluded mansion of its patriarch, the elderly Kinzo. It has been six years since Battler joined his cousins at the annual event, but their happy reunion is overshadowed by worsening weather and an eerie premonition from his youngest cousin. When their parents' conversation turns to the division of the inheritance upon Kinzo's imminent death, Battler and his cousins reminisce about the stories their parents teased them with as children-tales of the witch, Beatrice, who haunts the island's forest. But when people start dying unnatural deaths, Battler can't help but wonder?

Question Arc

1. Umineko When They Cry Episode 1: Legend of the Golden Witch
2. Umineko When They Cry Episode 2: Turn of the Golden Witch
3. Umineko When They Cry Episode 3: Banquet of the Golden Witch
4. Umineko When They Cry Episode 4: Alliance of the Golden Witch

Answer Arc
5. Umineko When They Cry Episode 5: End of the Golden Witch
6. Umineko When They Cry Episode 6: Dawn of the Golden Witch
7. Umineko When They Cry Episode 7: Requiem of the Golden Witch
8. Umineko When They Cry Episode 8: Twilight of the Golden Witch

The side story arcs are:

• Umineko Biyori
• Umineko no Naku Utage ni - Tea Party of the Witches
• Umineko no Naku Koro ni Episode X
• Umineko no Naku Koro ni Tsubasa
• Ougon Musoukyoku
• Umineko no Naku Koro ni Shi: Forgery of the Purple Logic