When Rosie's grandfather Paddy Larkin ends up in prison, she receives his Black Mercedes and the phone that comes with it
She is thrilled to receive the car until she gets a bone-chilling call from an annonymous caller demanding a ring located in the car. If she does not find it, then her grandfather will have an 'accident' in jail. It is up to her to save her grandpa without getting into any danger
If you don't hand me that ring you will regret it!
Her job is to give rides to her grandfather's friends but hopes they can give her some clues
I know that your wife's ring is fake and if you don't stop threatening me I will tell her and she will divorce you, leaving you broke!
Rosie and her friend Chris find the ring in the car's windshield washer container
She takes the ring home to her friend Glenda and they find out that the diamond is a fake because is doesn't scratch the mirror. The mysterious person knows she has the ring and they assume it is a rich man's wife's ring. His wife does not know about this fake ring and she would divorce him just like his last wife which cost him lots of money
She is stalked by one of his men then ends up giving the ring to his wife leaving the man no choice but to leave. She then sticks up to the caller and tells him to leave her alone