The last few weeks for Lanfeust have lasted sixteen years on Meirrion! Life has changed: Cixi, Hebus, his loved ones have aged, his son is almost his age. Thanos has become one of the most dreaded pirates of the Galaxy, and Prince Dheluu has fomented, in the shadow, a formidable plot. Despite the effects of the time lag, will Lanfeust manage to counter the Prince's plans? One hope: the bacterium Gwalax! Humor, adventure, feelings exacerbated by the time lag!