Suspense, Supernatural Mystery and Reasoning on the Bund.

Summary

The story follows Wu Wan Zhi, Hope Hopkins, and Huang He as they attempt to protect and understand the mysterious "Angel's Key" while being pursued by the Wings Society. Their journey takes them from Shanghai to London, facing dangerous sea battles and ultimately arriving at St. Wings Cathedral. At the cathedral, they discover an ancient stone tablet that warns of a potentially catastrophic gate between light and darkness. The key seems to have a mysterious power that responds to the Wings Society's presence, and inserting it into the tablet's groove triggers a dramatic revelation about a boundary between realms that can only be crossed by a pure heart, with a warning of a severe price in blood and soul.

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