Deadpool

Wade Wilson is a dishonorably discharged special forces operative working as a mercenary in New York City when he meets escort Vanessa. They become romantically involved, and a year later she accepts his marriage proposal. However, after Wilson is diagnosed with terminal cancer, he leaves Vanessa without warning so she will not have to watch him die.

A mysterious recruiter approaches Wilson, offering an experimental cure for his cancer. He is taken to Ajax and Angel Dust, who inject him with a serum designed to awaken latent mutant genes. They then subject him to days of torture to induce stress to trigger any mutation Wade may have, but without success. Wilson discovers Ajax's real name, Francis, and mocks him for it. In response, Ajax leaves Wilson in a hyperbaric chamber that takes him to the verge of asphyxiation periodically over a weekend. It finally activates a superhuman healing ability that cures his cancer, but leaves him severely disfigured with burn-like scars over his entire body. He escapes from the chamber and attacks Ajax, but relents when told that his disfigurement can be cured. Ajax subdues Wilson and leaves him for dead in the burning laboratory.