Two travellers, from London, are bringing guns to Sheriff Steadman, in Tregaron. Twm Sion Cati and Red Owain steal the weapons but think they are only samples. Cati needs to find what Sheriff is planning. Thomas Jones rescues Lady Joanne.
Vicar Davyd breaks into Thomas Jones home and accuses his mother on hiding Twm Sion Cati. He then traps Shanco and puts him on the rack. Cati sets him free but is forced to act when Red Owain attempts to rob Young Steadman and Lady Joanne.
Thomas Jones is blindsided and found unconscious by Wil ap Cradoc and his mother. Stedman is collecting taxes to raise an army but Twm Sion Cati and his gang steal the gold. Jones is under suspicion when he uses a stolen foreign coin.
Shanco breaks Thomas Jones out of jail. Young Stedman rides out to bring him back. Jones overhears him planning to kill Sir Tom and win favour with his wife Lady Joanne. Jones warns her of the plan and she admits knowing his true identity.
Sir Tom is dying, so Young Stedman helps the Vicar to terrorise the villagers into handing over Jones. Intercepting a pardon for Jones, he plots to kill his father, the Sherif. Lady Joanne tries to contact Sherif and end the bloodshed.