What is the plot of the cabin story

UncleTom is an elderly slave. He lives in a little cabin near his master's house and has repeatedly proven himself to be mild and obedient. His master, Mr. Shelby, feels no bad feelings about selling Tom down the river to pay a debt.

On the boat, Tom meets a naive young girl named Eva St. Clare, whose father is rich. St. Clare decides to buy Tom from his new master. St. Clare, buys Tom. Eva makes her father consent to free all his slaves when he dies.

St. Clare dies before he can free Tom and the other slaves. Tom is then sold to a Southern plantation owner who beats Tom to death when Tom rejects to reveal the location of some runaway slaves.

the right ones are in bold.

daintly refers to the fact she was reaching for what she ate, not necessarily what she is like.

greatest charm as in she possessed (=had) the greatest charm.

pleasant (her demeanor)

speaking (of her sensibility)

dead refers to the hypothetical mouse.

bleeding refers to the hypothetical mouse.