At her birthday picnic at the family estate, Mabel Vallance draws the attentions of Arthur Denison, a young man newly arrived in the colony. Mabel's outspoken little sister, Lotty, strongly disapproves. There is also the matter of Dr George Herbert, who has known Mabel for some time, and has developed strong feelings for her. But it seems that one of these men is concealing the truth about his past.
