A double_agent among

It's been four months since Barbie and her family went on that crazy mission in England. There was even an attempt on Barbie's life twice.
This causes Miss. Z to send Barbie Willows Wisconsin for her safety.
Barbie came across a secret of the past that can be a threat to her family, her grandfather's secret.
She had to protect her loved ones from a dead man. Or someone she thought who was dead.
Can she and her friends discover that secret before it's too late?