On a luxury liner going to the colonies Smith embarked, an illusionist black, and his wife Dainah, a mixed race. During a dancing party, this one is unleashed and provokes the envy of Michaux, a mechanic on board. When she leaves on the bridge, Michaux throws herself on her but she pushes him violently and bites her arm. The next day, the Commander showed her the liner and she recognized her assailant on her arm bandaged