Zane reads a myth about mermaids being attracted to ambergris (a substance found in whale droppings), and purchases a bottle of it from the internet. Lewis is not too keen on the idea (even though he realise it could be a chance to get back with Cleo), but he offers to look at the ambergris with Zane. The two are disgusted by the liquid's foul smell, and abandon the bottle on a table outside the JuiceNet cafe... where it is unfortunately found by the odious Nate, who apparently likes the smell, and sprays some on himself. But while everyone else retreats from Nate's smell, Emma, Rikki and Cleo seem drawn to him, and it doesn't take Lewis and Zane long to realise that Nate's popularity with the girls is due to the ambergris. Under its influence, the girls travel down to the beach with Nate, putting their secret in danger.