An old movie! Specifically, it is a movie about a boy who grew up when it thundered.

A young couple in a chemical factory are happy to have their son. Unexpectedly, both of them were poisoned one after another. The child was taken home by a kind female doctor, and the parrot and cat carefully raised by his father suddenly died. It turns out that the child contains a lot of poison, but it is still toxic after many treatments. And every time there is lightning, it will grow violently and increase its toxicity, so that it will eventually be destroyed by lightning.