Police dog Shilo is trained in drug detection and is put to work to locate drugs hidden in a large bushland park. Police dog Baz has many years in the force capturing murderers and armed robbers, but it’s now time for him to retire. Constable Shane Cavanagh has been training his replacement, new dog Hahm. Constable Pete Shearer and Police dog Baron have the difficult job of finding a stalker. Constable Warren Gates and police dog Asko are taking part in a major operation targeting drug crime on the rail network.