Villy er på rejse i rummet med sine forældre, da en meteorregn pludselig tvinger ham til at forlade både familie og rumskib. Hans redningskapsel lander på en vild og uudforsket planet. Heldigvis er Villy ikke helt alene! Med sig har han Buck - en overlevelsesrobot - og sammen må de holde stand indtil redningsfartøjet kommer og henter dem. Villy er heldigvis en nysgerrig dreng man ikke sådan slår ud, og går straks i gang med at undersøge planeten - til stor frustration for Buck, der er sat i verden for at holde Villy ude af problemer. Villy og Buck møder også rumvæsenet Flash, og sammen udforsker de den farverige planet, dens fauna, dens flora ... men også dens farer.
Willy is a smart and cute kid who is travelling in space with his mom and dad. A hit by an asteroid destroys their ship and Willy’s capsule lands on a wild planet with life on it. However, the boy is saved but alone on this planet with his only companion a survival robot who answered to the name Buck. While waiting for a rescue team to reunite him with his parents, Willy starts exploring his temporary home. He finds a fantastic landscape and extraordinary creatures, some of them - friendly to out boy but other - hostile. Forced to survive on this planet, Willy realises that he has the courage and abilities to not only stay alive till the arrival of his mom and dad but to enjoy his unexpected stay among new friends.