Military War Dog handler Liza Minot finally lands her big chance. A Delta Force mission requires her and Sergey's specialty - tracking explosives. When assigned to Master Sergeant Garret Conway's squad, her past confronts her. Back in high school days, he ran over her first dog. Rex's old age and failing health made it a cruelty or a mercy - she still can't decide which. However, Conway the boy and Conway the man are two very different problems.