Sergeant Rachel Bryce’s determination to uphold the rules at any cost has made her a pariah on the Tacoma police force. When she is put in charge of the new mounted division, dissension in the ranks seems to guarantee the program’s failure. Rachel asks an old college acquaintance to help her train the horses and their riders before they make their public debut amid the fireworks and crowds on the Fourth of July. Callan Lanford doesn’t play by the rules. She invents her own. The scion of a polo-playing dynasty, Cal has been riding since before she could walk, and she scores both on and off the field with equal ease. But she isn’t prepared for the emotional ride she takes as Rachel forces her to confront her achievement-oriented family’s rejection. Cal’s attraction to Rachel grows, but both their future together and the future of the mounted unit are uncertain, plagued by “accidents” and threats. As Rachel and Cal battle a corrupt politician’s greed in the face of mounting danger, can their love prevail?

Lieutenant Abigail Hargrove comes from a long line of cops...dirty cops. She's an exemplary, detached officer when on duty with the Tacoma Police Department, but after hours she strives in secret to atone for her relatives' corruption. Abby agrees to ride with her mounted unit during the Washington State Fair, expecting a relaxing few weeks of horses and PR work, but when she catches a loose horse that crosses her path, Abby's private and public lives collide. Wetland biologist Kira Lovell devotes her life to her daughter and to a vocal defense of the environment. After a bad relationship, she wants nothing more to do with domineering women, but a chance meeting with Abby throws her life—and her emotions—into chaos. When a kidnapping and a murder take place behind the innocence of the midway, Abby has to solve both crimes to protect Kira, even if it means revealing more of her family's shameful past.

Mounted police officer Billie Mitchell has come back from the memories of war to a place of peace: a job she loves, partners she trusts, and a new home in Tacoma’s rough and neglected Hilltop Area. But when a businessman is murdered and one of her neighbors becomes a suspect, her calm shatters yet again. Heiress Merissa Karr has earned her own fortune working in urban renewal. After she witnesses her boss’s murder, she becomes the next likely target, and for once, money can’t buy her out of trouble. She needs to rely on Billie and other Hilltop residents—people who amount to nothing in her social circles—for her very survival. On pristine polo fields and run-down city blocks, two worlds collide. Can hearts and minds open wide enough for acceptance and friendship to expand into love?