In a tense survival tale set around a shrinking pool, Day Theeradej Wongpuapan finds himself trapped when the water is drained and a ferocious crocodile closes in. The nightmare begins with Day lying injured in the drained space, the creature biting into his leg as he screams. The scene launches a gripping sequence of fear, resourcefulness, and a desperate bid to endure against a looming predator.
Six days earlier, the story unfolds in the same pool where Day is shooting for a project, while his girlfriend Koy and their dog Lucky wait for him to finish. The pool is alive with activity, but underlying tension hints at danger to come. Day finishes the shoot and, as the crew prepares to drain the water, he tries to relax on an inflatable raft with Lucky nearby. A warning from his boss about the draining pool foreshadows trouble, and Day dozes off, only to wake to a drastically lowered water level that makes escape nearly impossible. Without ladders or railings, his attempt to climb out injures the nail on his right index finger, amplifying the sense of isolation and peril as he calls for help that won’t come.
The following day, Koy arrives with a warm surprise for Day, and the moment becomes a microcosm of the couple’s fragile safety. She leaps into the pool to greet him, unaware of how low the water has dropped—she slips and hits her head on the diving board. Day pulls her onto the raft and races to wake her, revealing both tenderness and the fragility of their situation. A threat soon crawls into view as a crocodile inches toward Lucky, but fate tightens its grip when the animal slips on metal pipes by the pool and falls in itself, turning their sanctuary into a trap. By morning, the water has fully drained, leaving the two alone with nothing but a battered sofa for shelter.
With makeshift repairs and grit, Day bandages Koy’s wound using duct tape ripped from the crocodile’s mouth, and he uses Koy’s necklace to unscrew the drain cover in a bid to find an exit. The crocodile, however, proves a constant menace, entering the pool through the very route they hope to use for escape. Day forges a tense tunnel course through the drain system, eventually reaching a pumping station where a hidden ladder leads to a locked grate on the surface. He races back to the pool to shield Koy, saving her from another sudden attack as he uncovers the startling truth: Koy is pregnant, a revelation that deepens their stakes and their need to survive.
The next morning, heat, hunger, and the lack of his diabetes medication push Day toward exhaustion. He regains consciousness to a grim update from Koy: the crocodile has laid eggs in the pool. They counter the threat by trapping the creature in the drain and start a fire to cook and eat the eggs, hoping for nourishment and a momentary advantage. But the emotional strain between them grows as Day confesses doubts about fatherhood and even expresses a wish for abortion, a stark moment that tests their bond. Koy’s response—fueled by determination and courage—pushes Day to redefine his purpose: he must prove he can protect them both.
By day five, desperation leads them to release the crocodile back into the pool and venture into the drain system themselves. Day retrieves an insulin shot that was dropped into the grate days earlier, a small but crucial lifeline. The pair misinterpret a distant signal as a drone and set off to investigate, only to realize it is a remote-controlled glider. A violent rainstorm then alters the landscape: barbed wire is toppled, the drain system becomes slick and treacherous, and Day sustains a broken leg after a failed climb. He fashions a splint from wood and duct tape, while the crocodile continues to close in, chewing at his leg as depicted in the opening scene. A desperate moment arrives when Day drives the creature back with a nearby bucket, buying precious seconds.
Night brings a heavy downpour that floods the pumping station, and Koy finds herself increasingly at risk as the water rises. Day, fighting fatigue and fear, evades the crocodile and tries to navigate toward safety through the drain network, but the path changes as the grate slips and the rain surges. He ends up in a different pool, bleeding and weakening, and he collapses near the water’s edge while the animal looms. The relentless storm grows louder, and Day’s struggle becomes a race against time to reach the grate before the crocodile claims him.
On the seventh day, distant figures reappear when two men arrive after their own glider mission ends in failure, discovering a grim scene: blood stains and the word “help” scrawled in duct tape. They climb down a bamboo ladder attached to a pile of concrete pipes, but their search decision to leave the pool is chillingly wrong. Awakened and hearing Day approaching, he is attacked by the crocodile, but the falling pipes shake the area and the ladder retracts, leaving Day exposed as rainwater rises further and the pool becomes a deadly trap. In a moment of brutal escalation, the crocodile gnaws at Day’s torso while the rain swells around him. Just as the danger seems imminent, Koy’s whistle pierces the chaos through the grate, triggering a dramatic but bittersweet turn: Lucky lurches into the pool but, tragically, hangs himself on his leash as the rising water threatens them all. Day uses the sofa leg to impale the crocodile’s mouth and, with a metal pipe, delivers the finishing blow. He drags Lucky’s body and leash to climb out and rips open the grate to the pumping station, racing to pull Koy to safety before she drowns.
What follows is a harrowing, hard-won escape that tests every limit of endurance, love, and responsibility. In the end, a couple’s plea for survival and a father’s resolve collide in a brutal but hopeful push toward safety, with Day and Koy confronting the future they now face together. The film lingers on the stark reality of nature’s danger, the fragile line between life and death, and the unbreakable bond that can emerge when ordinary people are forced to become extraordinary in order to protect the people they love.
