1850. When Opal Sharp finds herself and her younger siblings suddenly orphaned and destitute, she thinks things can get no worse. But soon three of them - including Opal - are struck down with the illness that took their father from them, and her brother Charlie is forced to make an impossible decision. Unable to afford a doctor, he knows the younger children will not survive. So, unbeknownst to Opal, Charlie takes their younger siblings to the workhouse, where he knows they will at least be fed and have a roof over their heads.

Opal is heartbroken and struggles to forgive him. Charlie, in turn, takes bigger and bigger risks to try to support what's left of the Sharp family and earn Opal's forgiveness - but he takes it too far and finds himself in trouble with the law. Soon, he is sent on a convict ship to Australia.

As poor Opal is forced to say goodbye to the final member of her family, she makes a promise to reunite them all one day.