After a case of mistaken identity leads Angel to slay a demon protecting an innocent girl, karaoke is the only way to make things right. Meanwhile, Angel struggles with the discovery that he may not always be eternal and Darla recovers from her resurrection.

Angel directs Cordelia and Wesley to investigate the mysteriously abandoned Hyperion Hotel, and as they piece together the building's dark history, they discover that his interest is more personal than he let on. In a flashback to 1952, Angel is not the atoning vampire of present day, but a recluse who is detached from the tortured humans around him, until one fateful day.

 

When Cordelia has a particularly disturbing vision of Gunn in grave danger, she elects herself as his new protector. When she discovers that he may be his own worst enemy, she has to face the fact that she can't save him against his will.

 

Angel unwittingly crosses paths with Wolfram and Hart when he comes to the aid of a young woman, Bethany , who possesses telekinetic powers far beyond her control. No stranger to losing control, Angel takes her in and tries to help her deal with her gifts. However, Angel is distracted. He has no idea that his sleep has been fitful because of the influence of a daytime visitor.

 

Angel's continued restless nights send him into dreams of 1860 London and his first encounter with Drusilla , but when he sees Darla in his waking life, Cordelia, Wesley and Gunn fear he has gone off the deep end and may revert to his evil ways.

 

Angel travels to a mystical swami to help him understand his haunting dreams and to find his path again, but while he is away Wesley assumes Angel's identity to try to save a young girl and rather enjoys playing the role of a vampire with a soul.

 

Angel is desperate to rescue Darla from the clutches of Wolfram & Hart and flashbacks reveal what a dangerous and powerful relationship they shared as history weirdly seems to be repeating itself. The trip down memory lane begins with Darla being sired by the Master and ends with the gang of Spike, Drusilla, Darla and Angel being torn apart when Angel is cursed with a soul.

 

When Angel and the gang find out that there is going to be a robbery at a museum Angel and Gunn pose as members that are going to be involved in the robbery. But when the shroud the robbers are trying to steal turns out to have mind-altering effects can Angel and Gunn keep the shroud from falling into the wrong hands before they lose their minds?

 

Angel is still haunted by memories of his 150-year relationship with Darla and asks Gunn to help him track her down. He soon discovers, however, that he is faced with an impossible choice: watch her die from a terminal illness or "save" her by turning her once again into a soulless monster.

 

Drusilla has turned Darla back into a vampire, and Angel must catch them before she rises again and the two go back to their old ways. As he becomes more and more frantic, Angel begins to go off the deep end, and his staff worries that they are the only thing standing between Angel and real darkness.

 

After firing his staff and cutting himself off from all help, Angel begins intense physical and mental training to become strong enough to stop Darla and Drusilla before they destroy the City of Angels. Meanwhile, Cordelia, Wesley, and Gunn try to continue the good fight on their own now that Angel has abandoned the cause.

 

Angel threatens to expose Wolfram & Hart's criminal activities when he discovers that they are stealing large contributions that were made to a teen shelter -- but an old adversary has other plans.

 

Angel and the Host search for a physicist who they fear will cause the end of the world, but they are hampered by two Lubber demons who are seeking to subvert the scientist's work to their own dark ends. Wesley, Cordelia and Gunn settle into their new digs, where Virginia brings them their first official case.

 

Angel investigates rumors of renegade cops out for blood. Cordelia, Wesley and Gunn hear the same stories and try to catch the crooked cops in the act, but their plans go awry when they realize that these cops are not what they appear.

 

Angel learns of the impending visit of one of Wolfram & Hart's demonic "Senior Partners," and he plans to use the visit to launch a kamikaze mission to the beast's home dimension to take on evil at its very source.

 

After an empty night of passion with Darla, Angel wakes up with his soul still intact and has an epiphany. In a moment of clarity he realizes how deeply he had sunk into despair and how self-destructive his actions had become. He resolves to reunite with his crew, but Cordelia, Wesley and Gunn may not be ready to forgive him, even when their very lives are at stake.

 

Angel Investigations may be together again, but is the family ready to add a new sister? While the crew tracks down a cult of vampires with a very odd M.O., Cordelia gets a surprise visit from her old high-school buddy -- the now vampiric Harmony.

 

Lindsey McDonald is given an amazing bonus by his bosses at Wolfram & Hart -- a new hand to replace the one he lost fighting Angel. When the new hand begins acting strangely, Lindsey becomes suspicious, and when he runs into Angel and the gang researching body parts that seem to be turning on their owners, he must make a life-altering decision.

 

When a bloodthirsty demon emerges from a magickal portal on the stage in Caritas, the Host (whose name, we learn, is Krevlornswath or "Lorne" for short) asks Angel and the gang to find it and destroy it before it cuts a bloody swath through Los Angeles. When they discover that the beast is from the Host's home dimension, he is reluctantly pressed into service, but the answer to their problem may come from yet another portal...

 

After being inadvertently sucked into a dimensional portal, Cordelia finds herself stuck in Lorne's home world, Pylea, a place where demons rule and human beings are slaves at best. Back in L.A., Angel is determined to find a way to rescue Cordelia, but when it seems that travelling to Pylea is the only answer, Lorne begins to get cold feet. After spending years in L.A., he is not at all happy at the idea of a homecoming.

 

Angel and friends are trying to survive in a strange new world. Cordelia has inexplicably been made Princess of Pylea, but she begins to suspect that her guards may actually be her jailers. Wesley and Gunn search for a way to free Cordy from the castle, while Angel and Lorne get a very cold reception from the Dethwok Clan.

 

With the help of a strange girl from L.A. named Fred, Angel struggles with the inner beast that Pylea brings out in him. Cordelia learns that her role as princess involves mating with a demon, and Wesley and Gunn band with rebel forces to overthrow the government and Her Majesty. The gang must solve the problems of an entire world, and still manage to find a way back to their own.