An old case has reopened, and it's up to the DCU's top detectives to solve it! Gotham Girl is missing, and it will take both Batman and The Flash working together to find out where she's gone ... and if she has anything to do with the horrifying events at Sanctuary. Though old friends, the case and the disturbing events surrounding it, are tearing Batman and the Flash's friendship apart. Both Batman and the Flash have lost their sidekicks, will they also lose each other?

"Batman created by Bob Kane with Bill Finger - Superman created by Jerry Siegel and Joe Shuster, by special arrangement with the Jerry Siegel family" "Originally published in single magazine form in THE FLASH ANNUAL 2, BATMAN 64-65, THE FLASH 64-65, GREEN ARROW 45, 48-50."--Title page verso.