Middle aged, overweight Bob Reynolds remembers that he is the Sentry, a superhero whose "power of one million exploding suns" derives from a special serum. Realizing that his arch-nemesis the Void is returning, Reynolds seeks out several prominent Marvel characters to warn them and to discover why no one remembers the Sentry.

A series of one-shots completes the story from this volume, culminating in The Sentry vs The Void:

• The Sentry/Fantastic Four one-shot
• The Sentry/Spider-Man one-shot
• The Sentry/Hulk one-shot
• The Sentry/X-Men one-shot
• The Sentry/The Void one-shot

Collected in Sentry.

Translated into Spanish.