Riki-Tikki-Tavi was a young mongoose, who was swept out of his borrow by the strong current, lucky, he was found by Tommy and his father. Worried, they brought him inside.
Maybe he isn't dead
Look, there's a dead mongoose !
Nag took our egg when it fell from the nest and ate it!
This is a terrible, terrible day, there was never a day more terrible!
Rikki-Tikki was rather fond of his new home. All mongooses are curious, he would explore the vast gardens. One day Rikki-Tikki came across two birds, singing a song of woe.
While Darzee and Rikki-Tikki were talking, Nag himself emerged from the underbrush. Rikki-Tikki knew he must rid his garden of snakes, and Nag knew it would be the death of his wife, and their eggs if he allowed a mongoose to stay in their garden. Nag saw his wife Nagaina creeping up on Rikki-Tikki, so he began to talk, to distract Rikki-Tikki. The Cobra’s ploy would have worked, but Darzee’s wife saw Nagaina and warned Rikki-Tikki as she lunged, allowing Rikki-Tikki to escape.
Teddy comes running down the path towards Rikki-Tikki but in his was path was a deadly brown snake named Karait. Rikki-Tikki, desperate to save Teddy launched himself at Karait unaware at how dangerous it was compared to fighting Nag, for Karait could turn faster. But Rikki-Tikki Prevailed, hanging onto Karait until Teddy's father came.
Beware I am deatthhh!
Later that night Rikki -Tikki, on his nightly rounds, overhears Nag and Nagaina, plotting to kill Teddy's family. Nag slithers through the drain and into the bathroom, then lays in wait for Teddy's father to come. But Rikki -Tikki grabs the Nags hood and doesn't let go until Teddy's Father comes, roused by the noise. Finding Rikki -Tikki and Nag fighting on the floor, he kills Nag with his gun.
After Nagaina vowed to get revenge for Nag, Rikki-Tikki, scared of more Nag's, destroys all of Nagaina's eggs. Nagaina's precious eggs were normally guarded day and night by Nagaina heself, but Darrze's wife provided a detraction.
He ran from the burrow with one single egg in his clasp only to find Nagaina coiled next to Teddy; vowing to seek revenge for Nag. Rikki-Tikki then threatend to destroy the egg. Nagaina after realizing that was the last of her clutch ran with the egg.