What do you think about this idea?

Sam is an ordinary guy maybe a little rebellious and stubborn, but this is due more to his character to its surroundings. his life flows peacefully until the meeting with Lea, a girl from another dimension, endowed with magical powers and tormented by a recurring nightmare that features a psychopathic teddy bear: Leah tries to use Sam to retrieve an ancient magic book , which is kept in our dimension and more precisely in the house of his uncle (collector). unfortunately, the powers of Leah do not work properly in our world so Sam escapes to her mind control, forcing the girl to reveal its origins and its mission. Sam will be involved in an incredible adventure hounded by a ruthless enemy.