The film is set in the early 18th Century and involves smugglers and preventative officers. The on-shore leaders of the smugglers are a rascally lawyer and his wife who organise regular 'runs' of contraband. Richard Merivale, a wealthy young boy, whose parents are believed to have been lost at sea comes to live with them. By his efforts and with help of local children who endure many exciting adventures, the gang are brought to justice and Richard is reunited with the father.
Thomas Crimmins is a new warder, or guard, in an Irish prison. He is young, naive, and idealistic, determined to serve his country by his part in meting out justice to criminals.
A happy-go-lucky guy falls in love with his professor's daughter. Although his brother supports him, his financial situation forces him to make many sacrifices in life.
The evil scientist Dr. Caronte plots to revive the brains of three dead scientists and use them to obtain the formula for the super-powerful neutron bomb.
When a worker digging up a rose bed in the garden of a rich, influential factory owner uncovers a skeleton, suspicion spreads: Is the man who is so respected in the town possibly a murderer?