Leon Rollo whose nickname is "Patate" is an inventor adored by his wife and is daughter. He is mostly happy but his best friend Noël seems to succeed in everything he undertakes... Patate become increasingly jealous of this incredible luck.
Dos jóvenes que viven juntos en un castillo procuran llevar una existencia libre y despreocupada. Esta armonía se verá amenazada con la aparición de un tercer joven, quien llega al castillo en busca de refugio.
