RISKING IT ALL Detective Melody Zachary is determined to find who killed her nephew in a drug related murder. She's launched her teen center in his memory, to keep kids off the streets. And she'll prove to narcotics officer Parker Adams and his K-9 drug-sniffing partner, Sherlock, it's not a haven for dealers. As they risk their lives to save others, Melody discovers that Parker and she share the same deep commitment to making a difference. Will circumstances allow them to take the biggest risk yet, on love? Texas K-9 Unit: These lawmen solve the toughest cases with the help of their brave canine partners