Tough and determined, Molly Parker may be the only woman on her elite Texas Rangers squad, but she doesn't let that interfere with her commitment to finding the truth and making sure justice is served. While her position rankles some of her law enforcement colleagues who would like nothing more than to see her fail, she gets support from her fellow rangers -- led by company Cmdr. Luis Zea -- and from her brother and his wife. On the way out of her failed marriage, she strikes up an affair with DEA Agent Dan Winston.