Max, a young orphan with a rebellious character, is sent to live with the rich Hunter family in Amsterdam. As he adapts to his new life, he and his brothers and sisters must join forces to resolve the mysterious disappearance of their temporary godfathers, Erik and Kate. During this quest, Max discovers hidden secrets in the mansion and begins to suspect that not everything is what it looks like in this extravagant home. Together, brothers and sisters must overcome difficulties and face dangers in order to unravel the enigma that envelops their godparents and discover the truth behind their mysterious disappearance.