An Italian Dom guides a Swiss banker through the world of BDSM and she threatens his most important rule.

Sparked by curiosity and drawn by need, Swiss banker Claire asks Italian businessman Luca to introduce her to the D/s lifestyle. He agrees, as long as she abides by his number one rule of not falling in love. The two then embark on a slow, complete and realistic path of liberating Claire's true submissive nature.

But as their lessons progress, blurred lines morph into a child's scribbled drawing when feelings creep into their playtime. And with new emotions bubbling under the surface, Luca questions Claire's hard no. She calls "red" and walks away, leaving the Dom sure he's lost the one sub who finally saw his true desire to be cared for.

Now, certain she's broken his only rule and torn by thoughts of betraying her dead husband, Claire must decide between exploring the love she's found or locking away her heart with the ghosts of her past.