Terrorists kidnap the family (including Susanna York) of industrialist Jonas Bracken (Robert Culp). They are demanding a heavy price for the family's return. Meanwhile, Mrs Bracken's ex Jim McCabe (James Coburn) - the father of her son - is also alerted.
When he sees that the police investigation led by Inspector Nikolidis (Charles Aznavour) seems to be going nowhere fast, and the police want the terrorists dead more than the hostages released alive, he decides he must go into action himself. He discovers that the terrorists are using an abandoned monastery and concocts a plan using a group of hang gliding dare devils to silently swoop in and make a rescue. The police, however, are not quite as inept as he thinks and they are also moving in...
This is a good film with a straight forward plot which leads up to an extended gun fight. The terrorists are fairly dumb though put up a good fight. The hang gliding scenes in the Greek mountains are pretty spectacular. It isn't world beating but it does the job.