The usual flight of the cargo long-range penetrator "Argo" did not foretell any dangers. The goal of the trip was a planet on the border of the habitable galaxy - Solar Execution. The star that sheltered this planet was merciless to its inhabitants, nicknamed the sun dwellers. Aboriginal people exposed to direct sunlight simply burned alive. The jungle was full of predators fighting each other. Even an innocent-looking cloud hanging over the lake would gnaw the gaping person to the bone if he accidentally fell into it. And in the very heart of this eerie solar jungle there was a research base - Factoria, which at one point was attacked by the biosphere of an aggressive planet. And it had to happen that at that moment the “Argonauts” ended up on the planet...