Maisie Hitchins longs to be a detective. She's sure there are lots of adventures to be had on the streets of Victorian London. And, together with her faithful puppy, Eddie, she is determined to follow even the slightest scent of a mystery no matter what! Alice's father is having a run of bad fortune two of his ships have disappeared and he has lost a lot of money. Maisie is sure she can solve the mystery herself, so she heads down to London's sprawling docks to investigate. Can she discover what is happening at sea and save Alice's fortune?