Spots 
An ocean attack destroys a civilian vessel in 1916, casting American shipbuilder Bowen Tyler and fellow survivors into the icy Atlantic. Rescue arrives unexpectedly through a buoyant lifeboat ejected from the sinking ship, saving Bowen and a woman named Lys La Rue. Amidst catastrophic loss, immediate peril forces strangers to forge intense bonds of mutual dependence.
Chapter 1
Bowen Tyler, Lys La Rue, and an English tug crew face renewed enemy aggression in the English Channel. Rather than surrendering to a German U-boat, the British captain rams the submarine and leads a fierce hand-to-hand battle across its deck. By seizing control of the vessel, the survivors turn their immediate destruction into an audacious capture.
Chapter 2
Navigating the captured U-33 becomes dangerous as mechanical failures and ruined instruments point to an insider threat. Reports of Lys speaking with the imprisoned German commander spark agonizing doubts in Bowen regarding her loyalty. Disorientation worsens when tampered navigational tools quietly steer the submarine far off its intended western course.
Chapter 3
A treacherous crewman attempts to submerge the U-33 with Bowen trapped outside on the conning tower deck. Lys intervenes just in time by shooting the sabotateur and reversing the diving mechanisms before total disaster strikes. Poisoned water supplies and erratic ocean currents soon push the helpless vessel toward unknown, ice-rimmed southern lands.
Chapter 4
Penetrating a subterranean river wall reveals Caspak, a tropical continent enclosed by massive cliff barriers. Prehistoric reptiles and ancient flora thrive inside this volcanic crater, isolated entirely from the modern world. Facing extreme isolation, the captives and crew agree to a truce, pooling resources to survive against formidable ancient beasts.
Chapter 5
Constructing Fort Dinosaur requires constant vigilance against primitive humanoid tribes and airborne prehistoric predators. Tensions erupt within the camp when Baron von Schoenvorts violently strikes a crewman, forcing Bowen to establish strict military justice. Amidst relentless external threats, quiet moments allow Bowen and Lys to share their deepest vulnerabilities.
Chapter 6
The German crew betrays the truce by refining fuel, shelling Fort Dinosaur, and escaping on the U-33. Simultaneously, mystery surrounds the sudden abduction of Lys from her quarters during the night. Left stranded without heavy weaponry or naval transport, Bowen sets out alone into the uncharted hinterlands to track her captor.
Chapter 7
Bowen tracks Lys into northern cliffs inhabited by primitive Neanderthal-like tribes who hold her captive. Armed with a pistol, he rescues her from a tribal marriage ritual and secures shelter in a high cave. Surrounded by nocturnal predators and hostile cave dwellers, the couple relies on quick instincts and strategic rifle fire to survive the night.
Chapter 8
Captured by the Band-lu spear-men, Bowen observes how Caspakian human tribes evolve sequentially from basic club-users to advanced archers. Martial arts training enables Bowen to defend himself against brute force, earning temporary respect among his captors. Guided by a sympathetic local named So-ta, he continues north toward safer territories where more advanced tribes reside.
Chapter 9
Reunited atop the barrier cliffs after fending off a brute, Bowen and Lys establish a permanent life together as husband and wife. With no prospect of returning to civilization, Bowen seals his detailed manuscript inside a thermos bottle and casts it into ocean currents. This final act converts personal ordeal into an enduring message for the outside world.
Chapter 10
Experience a harrowing journey through lost evolutionary eras where human survival demands constant adaptation and vigilance.