Puzzled by the box they retrieved at Chapanga Beach, the X-Men call in Agent Brand. She tells them it's a Ghost Box, and that it's used for travel between parallel worlds. The team also finds out that the coordinates for "Tian" from the notebook they found match a spot in China known as the Dead Five Miles, in which nothing may be detected. They go there, and discover the floating retreat of a group of mutants who apparently died on M-Day.