Applejack is the substitute lifeguard on duty at the beach. Usual lifeguard Timber Spruce tells her lifeguard duty is typically uneventful, but Applejack resolves to be prepared for anything. When someone cries out for help, Applejack is the first to respond. When someone else gets in trouble, Timber Spruce springs to action so that Applejack doesn't make him look bad. This turns into a light competition between the two to see who can respond to trouble the fastest. 

When Bulk Biceps cries out for help in the water, Applejack and Timber both swim out to save him, but they pull him in opposite directions. Bulk starts to cry, not wanting to see Applejack and Timber fight. The two lifeguards realize their competition has been silly and that they actually make a good team, and they pull Bulk to shore together. Their determination to save people on the beach thus turns more friendly than competitive, much to Bulk's joy.