When delivering and presenting multimedia applications through a communication network, the presentation lag could be a major and critical factor affecting the multimedia presentation quality. In a good quality presentation the synchronism is always preserved, hence all the contents are presented in a continue way according to the authoring specifications. In this dissertation, a multimedia content prefetching plan is proposed in order to minimize the presentation lag and guarantee the synchronism between the media objects, which constitute the multimedia application. The proposed mechanism regards the multimedia applications developed using the NCL declarative language and it uses the events based synchronism advantage to determinate the ideal retrieval order of the media objects and to calculate their start retrieval times. Furthermore, important issues to be considered in a prefetch ambient are raised and the different algorithms that belong to the prefetching plan are developed.