The episode begins with a tense atmosphere as Ibara basks in his apparent victory, believing he has petrified everyone on the island. However, Senku confronts Ibara, paving the way for a final showdown.

Senku and his allies devise a plan to counter the petrification beam. They position themselves at equal distances from each other and use their bodies to measure the speed of the petrification beam. Thanks to this clever strategy, Senku can calculate the exact moment the beam will reach him, which is crucial for his survival plan.

The episode is a mix of science and action. Senku calculates the speed of the petrification beam and plans to throw a container of revival fluid into the air to revive himself after petrification. This risky plan relies on precise timing and calculations.

Meanwhile, members of the Kingdom of Science, including characters like Chrome, Ryusui, and Gen, play a vital role in executing the plan. They signal each other to track the beam's path, allowing Senku to perform his calculations.

The episode culminates in a dramatic confrontation between Senku and Ibara. Senku uses his scientific knowledge to outwit Ibara, who underestimates the young scientist's ingenuity. The tension peaks as the two battle for control of the Medusa device, a powerful tool capable of petrifying people.

Senku attaches a noise-making device to the Medusa, tricking Ibara into activating the device on himself. This clever tactic turns the tide, leading to Ibara's defeat and the Kingdom of Science's victory.

The episode ends with a poignant moment as Senku reflects on his journey and the importance of his friends and allies.