Mary Davidson has got used to looking after her five siblings whilst catering for her father's boisterous whaling crew. But when John Beck, an itinerant whaleman with a murky past, arrives on the doorstep wanting to join her father, Mary promptly develops an all-consuming crush which upends her world...Swinging from Mary's hopes and disappointments, both domestic and romantic, to the challenges that beset their tiny whaling operation, Rush Oh! is an enchanting celebration of both Mary's unique voice and an extraordinary episode in Australian history when a family of whalers formed a fond, unique allegiance with a pod of frisky killer whales - led by one named Tom.