High stakes for a desperate mum

KATHERINE Kelly looks grim-faced on a plane. In separate scenes, a teenage lad is drinking in a bar in Bulgaria. Something bad is going to happen...

- 

This is how all good thrillers start, with terrible trauma and preferably international travel.

Here, Katherine plays flight attendant Jo Conran, whose life is turned upside down when her 19-year-old son is imprisoned in Bulgaria for a murder he swears he didn't commit.

"I was in this bar, I didn't do anything. you've got to believe me," says Sonny (Harry Cadby). "It's all a mistake."