The episode begins with the pups enjoying themselves as always. Marshall, Skye, Rubble, and Rocky attempt to have a sliding contest, but the moment Skye attempts to climb up the steps, she leaps away with a yelp, as the heat has made the steps too hot. Marshall helps out by soaking the slide down with his water cannons, making it a water-sliding contest, and Rocky soon improves it with a slip-and-slide he had stored in his pup house.
Meanwhile, Ryder is giving Chase a good brushing, when they get a call from Cap'n Turbot, revealing that the baby whale has beached herself and he is doing his best to keep her wet so she doesn't dry out. Needing help, Cap'n Turbot asks the PAW Patrol for help, and Ryder says they are on their way. When the pups spot Marshall running in to join them in the elevator, they quickly part to ensure Marshall doesn't crash into them as always. The only crash is when Marshall smacks into the back of the elevator, and chuckles at how he made it as always.
Ryder calls the pups, reveals the situation, and dispatches Rubble and Marshall to help with the baby whale. As Skye shows empathy mentioning that the baby whale misses her mother, Rubble will attempt to clear a channel to help float the baby whale out to sea at high tide, while Marshall will help keep the whale wet until they can get it in the water again. The team deploy, and upon arriving, Marshall gets right to work, although the baby whale has some fun blowing Marshall across the beach when he gives it a drink and it spits it back out, right at him.
Rubble soon finishes the channel, and digs out the sand blocking the entrance for the water with his pup-pack. Soon, the tide starts to come in, but it's as high as it goes and not enough to reach the whale. Deciding they have to try and push the Baby Whale out, the plan fails as the Baby Whale sneezes everyone away as they attempt to push the first time. As they continue with keeping the whale wet, they soon hear the mother whale coming. Fearing that she could get beached as well, they attempt to scare her off with loud noises. It takes Marshall's firetruck horn and siren to finally convince the mother whale to back off, but as Cap'n Turbot notices her starting to panic in worry for her baby, they know they need to get the baby whale back in the water. Remembering the slip-and-slide that Rocky used earlier, Ryder has him bring it down to the beach, unrolling it into the water, and Marshall soaking it down with his water cannons. With Rocky's help, another attempt at pushing the baby whale back into the water succeeds, and she is reunited with her mother. When the whale and her mother leave, everyone says goodbye, only for Rubble to start sobbing and tear up. Marshall asks Rubble what's wrong, but he begins to deny it.
Afterwards, when Ryder wonders who's hungry, Cap'n Turbot joins in the pups' agreement with a little too much enthusiasm, but calms down as he reveals he keeps some fresh squid jerky with him at all times. After offering Ryder some, and Ryder graciously saying no, Ryder gives the pups some treats, then agrees they earned some beach time for their hard work. The other pups join them later on, and soon, as they all eat, Zuma spots the baby whale, who lets off a plume of water in thanks, ending the episode as the pups and Ryder cheer as we iris out on that good note.