Red Robin Seven Days of Death

"When Red Robin and his friends are trapped in the unknown world of the Unternet by the Calculator's fail-safe program, it's Batman and Robin to the rescue - but which Batman and Robin is it? Then, Red Robin is determined to destroy the villains' communications grid - but may hurt his allies in the process. Collected from RED ROBIN #18-21 and 23-26 and TEEN TITANS #92."