A new start in the big city for the Mitchell family goes horribly wrong as Sandra, Mike and their father become embroiled in the theft of diamonds.

Hidden jewels and a police search create havoc in the lives of Sandra and Mike Mitchell.

Brian is arrested, the villains are closing in and the pressure on Sandra is mounting.

A chase through darkened streets, an unlikely ally in a BMX bike leader and Sandra and Mike begin their fight back.

While Mike and Lee hack into the government computer a clever ruse sees Sandra lured into danger.

After a threatening visit from the mysterious figure behind the jewel robbery, Sandra decides to take on the villains at their own game.

The kids have hacked the computer, unmasked Mr Big and are tracking down the proof that will identify the rest of the crooks.

The action converges on the jewels, it is the final confrontation between Sandra and the villains.