Story Structure — 4 Plot Phases
The Missing Submarine
Contek summons Hayes after the Siren I disappears. He rejects blame for its possible power-system failure and joins the Siren II mission after learning Mark Macey was aboard.
Key Events
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Siren I Disappears — The submarine Siren I disappears, prompting an investigation.
Location: Underwater
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Hayes Is Summoned — Contek representatives summon Hayes from his quiet life. Characters: Wick Hayes, Contek 1, Contek 2
Location: Washington
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Design Blame — Steensland blames a possible reactor failure partly on Hayes's design. Characters: Wick Hayes, Contek 1, Contek 2
Location: Washington
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Hayes Rejects the Accusation — Hayes says Navy and Contek changes compromised his original plans. Characters: Wick Hayes, Contek 1, Contek 2
Location: Washington
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Macey Was Aboard — Hayes learns Mark Macey was aboard the missing submarine and is shaken. Characters: Wick Hayes
Location: Washington
Descent into the Rift
The crew finds that readings near the wreck do not match expectations, while Hayes and Phillips clash over the investigation. When Siren II drops toward a crevice, Hayes helps guide it onto a ledge.
Key Events
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Hayes Joins the Mission — Despite their bitter history, Hayes joins the investigation crew. Characters: Wick Hayes, Captain Phillips
Location: Siren II
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Wreck Readings Conflict — The readings near the wreck do not match expected radiation levels. Characters: Wick Hayes, Captain Phillips
Location: Near the Siren I wreck
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Hayes Barred from Control — Hayes and Phillips clash, and Phillips bars him from the control room. Characters: Wick Hayes, Captain Phillips
Location: Siren II control room
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Submarine Loses Control — Siren II loses control and drops toward a vast crevice. Characters: Wick Hayes, Captain Phillips
Location: Underwater crevice
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Ledge Landing — Hayes helps guide the submarine onto a ledge, avoiding a catastrophic fall. Characters: Wick Hayes, Captain Phillips
Location: Ledge in the crevice
The Search Team's Danger
Rivera leads an exploration through tunnels and the team discovers toxic chemical tanks. An unseen attacker paralyzes Fleming, and Rivera becomes separated during the retreat.
Key Events
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Damage Assessment Ordered — Phillips orders a damage assessment before exploration continues. Characters: Captain Phillips
Location: Siren II
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Rivera Leads the Search — Rivera leads a team into tunnels while the submarine tracks them. Characters: Ana Rivera, Fleming
Location: Rift tunnels
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Toxic Tanks Discovered — The search team finds toxic chemical tanks and hears strange noises. Characters: Ana Rivera, Fleming
Location: Rift tunnels
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Fleming Is Paralyzed — An unseen attacker paralyzes Fleming, forcing the explorers to retreat. Characters: Ana Rivera, Fleming
Location: Rift tunnels
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Rivera Becomes Separated — During the confusion, Rivera becomes separated from the others. Characters: Ana Rivera
Location: Rift tunnels
Secrets in the Cavern
Rivera finds shelter and then a passage into a cavern filled with cages and machinery. Hayes and the others reach her, discover chambers containing apparent fetuses, and encounter a creature; the scene ends before the outcome is revealed.
Key Events
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Rivera Becomes Separated — During the confusion, Rivera becomes separated from the others. Characters: Ana Rivera
Location: Rift tunnels
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Shelter in Supply Room — Rivera takes shelter as the threat closes in. Characters: Ana Rivera
Location: Chemical supply room
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Passage to the Cavern — Rivera finds a passage leading into a huge cavern. Characters: Ana Rivera
Location: Passage beneath the supply room
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Cages and Machinery — Rivera discovers a cavern filled with cages and machinery. Characters: Ana Rivera
Location: Huge cavern
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Hayes Reaches Rivera — Hayes and the others reach Rivera and find chambers containing apparent fetuses. Characters: Wick Hayes, Ana Rivera, Captain Phillips, Lt. Nina Crowley
Location: Huge cavern
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Creature Appears — A creature appears; Hayes warns the crew not to shoot before the scene ends. Characters: Wick Hayes, Ana Rivera, Captain Phillips, Lt. Nina Crowley
Location: Huge cavern