Searching for Hope by Tonya Burrows

He’ll risk everything for a second chance.

In the courtroom, defense attorney Callum Holden fights for justice, but when it comes to matters of the heart, he’s about to face his toughest case. The brilliant and beautiful true crime researcher Ellie Summers, once the keeper of his heart, now barely acknowledges his existence. In a last-ditch effort to win her back, Cal vows to solve the one mystery that has haunted her for decades: the disappearance of her older sister, Hope.
She’s not willing to compromise her principles… or her heart.
Ellie has a steadfast moral code and refuses to be swayed by a man who makes his living defending the worst of humanity. Between her podcast production company and training Puzzle, her search and rescue puppy, she tells herself she’s too busy to miss the charming lawyer with the distractingly good looks. Yet, when Cal presents a photo of a teenage girl resembling her missing sister, she drops everything and joins forces with him to find the truth.
But everything is not what it seems…
Their mission: infiltrate the Hope’s Embrace Commune during its annual couple’s retreat. It’s idyllic at first, and the longer they stay, the hotter the spark between them blazes. But then the lies, manipulation, and mysterious disappearances begin to surface. Someone within the walls knows exactly what happened to Hope… and is willing to kill to keep the commune’s secrets.
…and finding Hope might mean losing each other.