The Lion Guard is on partol. Suddenly, their patrol is disrupted by a Hyrax stampede. The cause of the stampede is revealed to be a Harrier Hawk named Mpishi, who grabs one of the hyraxes. The Lion Guard give chase and make her let the hyrax go. They then tell Mpishi to return to her territory. Mpishi flies off but toward the rest of the Pride Lands due to a desire to try some new food. A watching Hammerkop named Kulinda decides to leave her egg in Ono's nest until she finishes rebuilding her nest.
When The Lion Guard gets back to Ono's nest and discovers the egg, the resolve to find the mother Hammerkop while Ono watches the egg. On the way, they run into a rainstorm that causes a mudslide. Mpishi spots some Red Rock Hares but when the Lion Guard shows up to save the hares from the mudslide she flies away. After they save the Hares, they continue looking for the mother Hammerkop who they learn is Kulinda. Meanwhile, a girl Hammerkop hatches out of the egg. Elsewhere, Mpishi runs into Mwoga. Mpishi offers him some fresh food if he helps her outwit the Lion Guard. After he tells her he only eats Carrion, she offers that instead and he agrees.
After Kulinda and the Lion Guard arrive back at Ono's nest, Kulinda discovers the hatching and calls for her daughter. Suddenly, Mpishi and Mwoga come in and snatch the baby Hammertog away. Working together, Kulinda and Ono save the baby and defeat the pair. The Lion Guard tells Mpishi to go back to her territory and Kulinda names her baby Ona in Ono's honor.
- Atticus Shaffer as Ono
- Carla Hall as Mpishi
- Elise Allen as Kulinda
- Cam Clarke as Mwoga
- Max Charles as Kion
- Joshua Rush as Bunga
- Diamond White as Fuli
- Dusan Brown as Beshte
- Kari Wahlgren as Red Rock Hare
- Dee Bradley Baker as Masikio, Hyrax and Ona
- Although the episode synopsis states that Ono takes care of a cuckoo bird's egg, the egg is actually that of a hamerkop. There are no cuckoo birds in the episode.
- Bunga references Babysitter Bunga when volunteering to watch over the egg.