Final answer:
The plot involves Sam exploring a cave alone, getting injured, being rescued by Ritchie, and learning a lesson about safety and companionship.
Step-by-step explanation:
Description of the Plot
Problem: The main character, Sam, decides to explore a cave alone because his friend Harry is sick, despite knowing the risks involved in solo exploration.
Action: As Sam is exploring the cave, he slips and sprains his ankle, leaving him unable to exit the cold pool he has fallen into.
Climax: Sam is in a vulnerable situation, reflecting on his poor decision and feeling regretful when suddenly he hears someone calling out to him — it's Ritchie, who comes to the rescue.
Outcome: Ritchie, having been sent by Harry, helps Sam out of the cave, and Sam resolves never to go exploring alone again.