洛杉磯警察羅素（亞倫艾克哈特 飾）與他的警犬「艾斯」在街上與毒販發生槍戰，艾斯意外遭到槍殺，羅素想查明兇手的真實身份，卻受到上級千方百計的阻饒，他決定與名為「襪子」的新警犬合作，揭開隱藏在這座城市後的龐大陰謀。

A soldier becomes quite upset when he is transferred from the highly coveted machine-gun unit to the canine corps. He begins to change his opinion when he learns that his army dog Mike was a gift from an eight-year-old whose father was killed in the war. Now the soldier becomes committed to training Mike into the best army dog there ever was.

A boy tries to protect his dog, a German shepherd that served with U.S. Army forces after it begins attacking strangers several years after the war.

SEARCHDOG is the story of Matthew Zarrella, a Rhode Island State Police Sergeant who rehabilitates “unadoptable” pound dogs and transforms them into Search & Rescue/Recovery Dogs. We come to know Matthew and his dogs and witness extraordinary moments over four and a half years of real-time searches as he trains troopers and their new canine partners to find missing persons.

Everyone thinks new recruit Hansel is too small to be a K-9 dog, but when a greedy package thief is ruining the holidays, little Officer Hansel must go on a mission to catch him and save Christmas.