The illustration is on the endpapers.

When Flight 1421 crashes into the ocean six minutes after take-off, the surviving passengers believe they are the lucky ones until the plane starts to sink to the ocean floor, trapping them inside, and they must wait to be rescued as both air and time run out.

Six minutes after takeoff, Flight 1421 crashes into the Pacific Ocean. The plane sinks to the bottom with twelve passengers trapped inside. More than two hundred feet below the surface, engineer Will Kent and his young daughter, Shannon, are waist-deep in water and fighting for their lives. Their hopes rest with a rescue team on the surface, led by professional diver Chris Kent-- Will's soon-to-be ex-wife. There's not much time-- and there's even less air. -- adapted from jacket