A severely weakened young man, identified as the new host for a mysterious artifact, is brought to a facility for testing. Agents note the artifact's unprecedented energy levels, dismissing the man as a wasted resource. He undergoes grueling physical trials, revealing his body is weak but his bond with the object is uniquely stable. An emergency alert interrupts them, signaling an alien attack. The test is abruptly halted, and the man, Jack, is ordered to be taken to the scene, leaving him confused and unprepared.