The digital generation of a story in which users have influence over the narrative is emerging as an exciting example of computer-based interactive entertainment. Interactive storytelling has existed in non digital versions for thousand of years, but with the advent of the Web the demand for enabling distributed cyberdrama generation is becoming increasingly common. To govern the complexity stemming from the distributed generation of complex plots, we have devised an event synchronization service that may be exploited to support the distribution of interactive storytelling activities over the Web. The main novelty of our approach is that the semantics of the cyberdrama is exploited to discard obsolete events. This brings to the positive result of speeding up the activity of drama generation, thus enabling an augmented interactivity among dispersed players. Categories and Subject Descriptors H.5.1 [Information Interfaces and Presentation]: Multimedia Information Systems ? artificial, a...