Detective Conan Movie 5: Countdown to Heaven

Synopsis:

After enjoying a camping trip, Conan, Haibara and the rest of the Detective Boys take a trip to the newly-constructed Nishitamashi Twin Tower Buildings - considered by some to be the closest place to heaven. However, when a man is found dead, foul play is suspected; and Conan believes that the organization who poisoned him and turned his body into that of a child's is somehow involved. Meanwhile, Haibara has become suspicious, sneaking off to make phone calls in the night. Could these events be related?