New parents Pi and Cordelia have been enjoying a period of quiet since their last run-in with the reef's resident shark Troy.

Seeing an opportunity to kidnap Cordelia, Troy sends his loyal factotum Ronny into the community to distract Pi and the rest of his friends and neighbours while he concocts his plan of revenge.

But with Pi weary of strangers coming to the reef, it isn't long before he recognises Ronny's real intent and so sets about stopping Troy once and for all...