In Too Deep by Melody Tyden

For years, Cara lost herself in her music. At the piano, she could forget about the death of her parents and the restrictions that keep her from getting close to anyone, but when it’s suddenly taken from her, she’s forced to reevaluate everything she thought she knew. With the handsome street musician she met by chance encouraging her, Cara begins to look deeper into the world she’s always lived in and the people who lurk around its edges.
Kian has been working towards one goal for years: putting Marco Russo behind bars. Going undercover to get closer to Marco’s sister was supposed to be a means to an end, but the more time they spend together, the harder it gets to separate what’s happening between them from the job he’s there to do. If he brings Marco down, Cara’s world also crumbles, and that might just destroy him too.

How far can they go before they’re in too deep?