One night, through a knot under a mangrove hemp, a firefly broke into the sea with a cheerful light. It was an hour and one more, as he was looking into the darkness: night, no matter how long do you look. And he realized: "It's so boring to be alone. I'll go look for friends. -" Not all the inhabitants of the sea depths were happy about the appearance of the firefly, but there were also those who needed his help, who were glad of the light. At the end of the film, the firefly finds a whole whirlpool of fireflies like him and rushes towards them.