Tuck is a small island that becomes a secret base for the Scarlet Guard in Glass Sword , after Maven reveals the truth about Naercey. In King's Cage , the Scarlet Guard leave Tuck and move to Irabelle after fear that Mare will reveal the location, under interrogation by a whisperer, namely Samson Merandus.
In Glass Sword the Scarlet Guard got to Tuck in an underwater boat. After arriving, Cal is captured by Colonel Farley and caged inside Barracks 1 on the underwater part of the island. Later, Mare Barrow, Diana Farley, Shade Barrow, Kilorn and Cal escaped the island to recruit newbloods.
- Mare reunites with her family in Tuck
- Shade Barrow is buried in Tuck.