Lincoln takes members of the team to Las Vegas where Sucre gets an indecent proposal. Sara learns about Michael's condition, and Roland pushes his luck too far. Gretchen teams up with T-Bag who makes an offer to Michael he cannot refuse. Meanwhile, the secrets in Whistler's bird book are finally revealed.

Wyatt gets a taste of his own medicine, and Mahone finds some resolution. T-Bag scrambles when the police investigate his missing co-worker while Gretchen gets cozy with a Company man. Michael's condition continues to worsen, and a team member makes the ultimate sacrifice while planning the underground break-in for Scylla.