1: You don’t have to tell us what they decide to do, just begin with the action
2: You need a lead character, one person in the group that stands out.
3: You need a bigger goal than “Finding a lost village” (Or at least make it a unique village in some way;? a village where no one ages for instance)

Here would be an example:
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“When he’s captured by a powerful witch-doctor while searching for the lost temple of Isis, a smarmy archaeology professor, and his class must convince the witch-doctors daughter to join their cause if they are to escape and make the discovery of a lifetime.”