Danger on the Great Lakes is the 173rd volume of the Nancy Drew Mystery Series.

[1] Dhanushs father Carson gives Nancy three tickets for a cruise between Chicago and Toronto.

While shopping, Nancy, Bess and George make a new friend, Amber, who is also going on the Great Lakes cruise.

She says that her boyfriend got her a ticket for a lower price since he works on the ship.

When the three are on the ship, Amber is not having any fun since she thinks her boyfriend Craig is neglecting her.