Ranger is a golden retriever with special search-and-rescue training and a mysterious time-traveling first aid kit. In this thrilling adventure, his magical collar transports him all the way back to 1912, landing him right on the deck of the famous Titanic. Everyone believes the magnificent ocean liner is completely unsinkable, especially young Patrick Murphy. Patrick grew up near the shipyard where the Titanic was built and is thrilled to be working as part of the crew on its maiden voyage. Ranger quickly befriends Patrick and two young passengers, Maryam and Hamad, as they explore the massive ship. But the excitement turns to terror when the ship strikes an iceberg in the dead of night and begins taking on freezing water. With panic spreading across the decks, Ranger must rely on his rescue training to guide his new friends through the sinking ship. It is a desperate race against time to reach the lifeboats before the unsinkable ship disappears into the icy ocean forever.